Exhibit 99.1

Press Release

Gulfport Energy Corporation Reports Fourth Quarter and Year-End 2016 Results

OKLAHOMA CITY (February 13, 2017) Gulfport Energy Corporation (NASDAQ: GPOR) (“Gulfport” or the “Company”) today reported financial and operational results for the quarter and year ended December 31, 2016 and provided an update on its 2017 activities. Key information includes the following:

Financial Results

For the fourth quarter of 2016, Gulfport reported a net loss of $240.4 million, or $1.86 per diluted share, on oil and natural gas revenues of $63.4 million. For the fourth quarter of 2016, EBITDA (as defined and reconciled below) was negative $44.4 million and cash flow from operating activities before changes in operating assets and liabilities was $86.1 million. Gulfport’s GAAP net loss for the fourth quarter of 2016 includes the following items:

Excluding the effect of these items, Gulfport’s financial results for the fourth quarter of 2016 would have been as follows:

For the full year of 2016, Gulfport reported a net loss of $979.7 million, or $7.97 per diluted share, on oil and natural gas revenues of $385.9 million. For the full year of 2016, EBITDA was $43.4 million and cash flow from operating activities before changes in operating assets and liabilities was $366.9 million. Gulfport’s GAAP net loss for the full year of 2016 includes the following items:

Excluding the effect of these items, Gulfport’s financial results for the full year of 2016 would have been as follows:

Production and Realized Prices

Gulfport’s net daily production for the fourth quarter of 2016 averaged approximately 787.0 MMcfe per day. For the fourth quarter of 2016, Gulfport’s net daily production mix was comprised of approximately 87% natural gas, 9% natural gas liquids and 4% oil. Gulfport’s net daily production for the full year of 2016 averaged approximately 719.8 MMcfe per day. For the full year of 2016, Gulfport’s net daily production mix was comprised of approximately 86% natural gas, 9% natural gas liquids and 5% oil.

Gulfport’s realized prices for the fourth quarter of 2016 were $0.41 per Mcf of natural gas, $32.41 per barrel of oil and $0.52 per gallon of NGL, resulting in a total equivalent price of $0.88 per Mcfe. Gulfport’s realized prices for the fourth quarter of 2016 include an aggregate non-cash derivative loss of $139.3 million. Before the impact of derivatives, realized prices for the fourth quarter of 2016, including transportation costs, were $2.34 per Mcf of natural gas, $45.15 per barrel of oil and $0.56 per gallon of NGL, for a total equivalent price of $2.67 per Mcfe.

Gulfport’s realized prices for the full year of 2016 were $1.12 per Mcf of natural gas, $35.65 per barrel of oil and $0.35 per gallon of NGL, resulting in a total equivalent price of $1.46 per Mcfe. Gulfport’s realized prices for the full year of 2016 include an aggregate non-cash derivative loss of $323.3 million. Before the impact of derivatives, realized prices for the full year of 2016, including transportation costs, were $1.85 per Mcf of natural gas, $38.18 per barrel of oil and $0.37 per gallon of NGL, for a total equivalent price of $2.13 per Mcfe.

GULFPORT ENERGY CORPORATION

PRODUCTION SCHEDULE

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2016 Financial Position and Liquidity

For the year ended December 31, 2016, Gulfport’s drilling and completion capital expenditures totaled $518.4 million, midstream capital expenditures totaled $11.0 million and leasehold capital expenditures (net of proceeds from leasehold sales and excluding the previously announced December 2016 acquisition in the Utica Shale) totaled $20.1 million.

As of December 31, 2016, Gulfport had cash on hand of approximately $1.3 billion. In addition, as of December 31, 2016, Gulfport’s revolving credit facility of $700 million was undrawn and had $490.3 million available for future borrowing after giving effect to outstanding letters of credit totaling $209.7 million.

2017 Capital Budget and Production Guidance

For 2017, Gulfport estimates total capital expenditures will be in the range of $1.0 billion to $1.1 billion. The 2017 budget includes approximately $845 million to $915 million for drilling and completion activities, $50 million to $60 million for midstream capital expenditures associated with its investment in Strike Force Midstream LLC with Rice Energy and $110 million to $120 million for leasehold activities during 2017, excluding its pending acquisition of oil and natural gas assets from Vitruvian II Woodford, LLC (“Vitruvian”) discussed below.

Gulfport currently estimates that 2017 average daily net production will be in the range of 1,045 MMcfe to 1,100 MMcfe per day, an increase of 45% to 53% over its 2016 average daily net production of 719.8 MMcfe per day. Total production for 2017 is expected to be approximately 88% natural gas, 8% natural gas liquids and 4% oil.

Gulfport expects that its realized natural gas price, utilizing current strip pricing and before the effect of hedges and inclusive of the Company’s firm transportation expense, will average in the range of $0.56 to $0.62 per Mcf below NYMEX settlement prices in 2017. Before the effect of hedges, the Company estimates that its 2017 realized NGL price will be approximately 35% of WTI and its 2017 realized oil price will be in the range of $4.50 to $5.50 per barrel below WTI.

The table below summarizes the Company’s full year 2017 guidance:

GULFPORT ENERGY CORPORATION

COMPANY GUIDANCE

Operational Update and 2017 Outlook

Utica Shale

In the Utica Shale, Gulfport spud 19 gross (15.6 net) wells and turned-to-sales 11 gross and net wells during the fourth quarter of 2016. Net production during the fourth quarter of 2016 from Gulfport’s Utica acreage averaged approximately 768.0 MMcfe per day, an increase of 8% over the third quarter of 2016 and an increase of 23% over the fourth quarter of 2015. At present, Gulfport has six operated horizontal rigs drilling in the play.

Gulfport continues to realize operational efficiency gains in the Utica Shale and, during 2016, Gulfport spud 50 gross wells with an average lateral length of approximately 8,340 feet and average drilling days from spud to rig release of approximately 23.5 days. In addition, Gulfport turned-to-sales 54 gross wells with an average lateral length of approximately 8,329 feet and an average of approximately 6.9 stages completed per day. For the full year 2016, Gulfport’s well costs averaged approximately $1,075 per foot of lateral in the Utica Shale.

During 2017, Gulfport plans to run six operated horizontal rigs. Gulfport has budgeted to drill approximately 87 to 97 gross (67 to 74 net) horizontal wells and turn-to-sales 72 to 80 gross (61 to 67 net) horizontal wells in the Utica. In addition, Gulfport plans to participate in non-operated activities taking place on its acreage by other operators that plan to drill approximately 10 to 11 horizontal wells and turn-

to-sales 9 to 10 horizontal wells, in each case net to Gulfport’s interest. Due to increased efficiencies in 2016, Gulfport has decreased its total expected well costs for 2017 by approximately $750,000 per well, relative to the previously provided estimates, for a standard 8,000 foot lateral.

SCOOP

As previously announced, on December 13, 2016, Gulfport entered into a definitive agreement with Vitruvian to acquire approximately 46,400 net surface acres with multiple producing zones, including the Woodford and Springer formations, in Grady, Stephens and Garvin Counties, Oklahoma. The properties to be acquired in this transaction are located primarily in the over-pressured liquids-rich to dry gas windows of the play and include approximately 48 producing horizontal wells and an additional interest in over 150 non-operated horizontal wells. The acquisition is expected to close in February 2017, subject to the satisfaction of certain closing conditions.

During 2017, and following the closing of the acquisition, Gulfport plans to run four operated horizontal rigs on this SCOOP acreage. Gulfport has budgeted to drill approximately 19 to 21 gross (16 to 18 net) horizontal wells and turn-to-sales 17 to 19 gross (14 to 16 net) horizontal wells in the SCOOP. In addition, Gulfport plans to participate in non-operated activities taking place on this acreage by other operators that plan to drill approximately 1 to 2 horizontal wells and turn-to-sales 1 to 2 horizontal wells, in each case net to Gulfport’s interest.

Southern Louisiana

At its West Cote Blanche Bay and Hackberry fields, Gulfport performed 77 recompletions during 2016. During the fourth quarter of 2016, net production at these fields totaled approximately 17.9 MMcfe per day.

During 2017, Gulfport plans to run one drilling rig and one recompletion rig in these fields.

Derivatives

Gulfport has hedged a portion of its expected production to lock in prices and returns that provide certainty of cash flow to execute on its capital plans. The table below sets forth the Company’s hedging positions as of February 13, 2017.

GULFPORT ENERGY CORPORATION

COMMODITY DERIVATIVES - HEDGE POSITION

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Year-End 2016 Reserves

Gulfport reported year-end 2016 total proved reserves of 2.3 Tcfe, consisting of 2.2 Tcf of natural gas, 5.5 MMBbls of oil and 20.1 MMBbls of natural gas liquids. Gulfport’s year-end total proved reserves increased 36% over year-end 2015. The table below provides information regarding the components driving the 2016 net proved reserve increase:

GULFPORT ENERGY CORPORATION

DECEMBER 31, 2016 NET PROVED RESERVE RECONCILIATION

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Proved developed reserves increased by 12% over 2015 to approximately 859.9 Bcfe as of December 31, 2016. At year-end 2016, approximately 37% of Gulfport’s proved reserves were classified as proved developed reserves. Proved undeveloped reserves increased by 56% from December 31, 2015 to approximately 1,461.2 Bcfe as of December 31, 2016. The table below summarize the Company’s 2016 net proved reserves:

GULFPORT ENERGY CORPORATION

DECEMBER 31, 2016 NET PROVED RESERVES

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The following table presents Gulfport’s 2016 net proved reserves by major operating areas:

GULFPORT ENERGY CORPORATION

DECEMBER 31, 2016 NET PROVED RESERVES BY ASSET AREA

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In accordance with Securities and Exchange Commission guidelines, at year-end 2016, reserve calculations were based on the average first day of the month price for the prior 12 months. The prices utilized for Gulfport’s year-end 2016 reserve report were $42.75 per barrel of oil and $2.48 per MMBtu of natural gas, in each case as adjusted by lease for transportation fees and regional price differentials. Utilizing these prices, the present value of Gulfport’s total proved reserves discounted at 10% (referred to as “PV-10”) was $696 million at December 31, 2016. PV-10 is a non-GAAP measure because it excludes income tax effects. Management believes that the presentation of the non-GAAP financial measure of PV-10 provides useful information to investors because it is widely used by professional analysts and sophisticated investors in evaluating oil and gas companies. PV-10 is not a measure of financial or operating performance under GAAP. PV-10 should not be considered as an alternative to the standardized measure as defined under GAAP. We have included a reconciliation of PV-10 of proved reserves to the standardized measure of discounted future net cash flows, the most directly comparable GAAP measure.

GULFPORT ENERGY CORPORATION

DECEMBER 31, 2016 PV-10

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The following table reconciles the standardized measure of future net cash flows to the PV-10 value of Gulfport’s proved reserves:

GULFPORT ENERGY CORPORATION

DECEMBER 31, 2016 PV-10 RECONCILIATION

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Presentation

An updated presentation has been posted to the Company’s website. The presentation can be found at www.gulfportenergy.com under the “Company Information” section on the “Investor Relations” page. Information on the Company’s website does not constitute a portion of this press release.

Conference Call

Gulfport will hold a conference call on Tuesday, February 14, 2017 at 8:00 a.m. CST to discuss its fourth quarter and full year of 2016 financial and operational results and to provide an update on the Company’s recent activities.

Interested parties may listen to the call via Gulfport’s website at www.gulfportenergy.com or by calling toll-free at 866-373-3408 or 412-902-1039 for international callers. A replay of the call will be available for two weeks at 877-660-6853 or 201-612-7415 for international callers. The replay passcode is 13622396. The webcast will also be available for two weeks on the Company’s website and can be accessed on the Company’s “Investor Relations” page.

About Gulfport

Gulfport Energy Corporation is an Oklahoma City-based independent oil and natural gas exploration and production company with its principal producing properties located in the Utica Shale of Eastern Ohio and along the Louisiana Gulf Coast. In addition, Gulfport holds a sizeable acreage position in the Alberta Oil Sands in Canada through its 25% interest in Grizzly Oil Sands ULC.

Forward Looking Statements

This press release includes “forward-looking statements” within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). All statements, other than statements of historical facts, included in this press release that address activities, events or developments that Gulfport expects or anticipates will or may occur in the future, including but not limited to the pending acquisition from Vitruvian, future capital expenditures (including the amount and nature thereof), business strategy and measures to implement strategy, competitive strength, goals, expansion and growth of Gulfport’s business and operations, plans, market conditions, references to future success, reference to intentions as to future matters and other such matters are forward-looking statements. These statements are based on certain assumptions and analyses made by Gulfport in light of its experience and its perception of historical trends, current conditions and expected future developments as well as other factors it believes are appropriate in the circumstances. However, whether actual results and developments will conform with Gulfport’s expectations and predictions is subject to a number of risks and uncertainties, general economic, market, credit or business conditions; the opportunities (or lack thereof) that may be presented to and pursued by Gulfport; Gulfport’s ability to identify, complete and integrate acquisitions of properties and businesses; competitive actions by other oil and gas companies; changes in laws or regulations; and other factors, many of which are beyond the control of Gulfport. Information concerning these and other factors can be found in the Company’s filings with the Securities and Exchange Commission, including its Forms 10-K, 10-Q and 8-K. Consequently, all of the forward-looking statements made in this news release are qualified by these cautionary statements and there can be no assurances that the actual results or developments anticipated by Gulfport will be realized, or even if realized, that they will have the expected consequences to or effects on Gulfport, its business or operations. Gulfport has no intention, and disclaims any obligation, to update or revise any forward-looking statements, whether as a result of new information, future results or otherwise.

Non-GAAP Financial Measures

EBITDA is a non-GAAP financial measure equal to net (loss) income, the most directly comparable GAAP financial measure, plus interest expense, income tax (benefit) expense, accretion expense, depreciation, depletion and amortization and impairment of oil and gas properties. Adjusted EBITDA is a non-GAAP financial measure equal to EBITDA less non-cash derivative loss, gain from insurance proceeds, loss from impairment of Grizzly equity investment, loss on debt extinguishment and loss from equity method investments. Cash flow from operating activities before changes in operating assets and liabilities is a non-GAAP financial measure equal to cash provided by operating activity before changes in operating assets and liabilities. Adjusted net income is a non-GAAP financial measure equal to pre-tax net loss less non-cash derivative loss, loss from impairment of oil and gas properties, gain from insurance proceeds, impairment of Grizzly equity investment, loss on debt extinguishment and loss from equity method investments. The Company has presented EBITDA and adjusted EBITDA because it uses these measures as an integral part of its internal reporting to evaluate its performance and the performance of its senior management. These measures are considered important indicators of the operational strength of the Company’s business and eliminate the uneven effect of considerable amounts of non-cash depletion, depreciation of tangible assets and amortization of certain intangible assets. A limitation of these measures, however, is that they do not reflect the periodic costs of certain capitalized tangible and intangible assets used in generating revenues in the Company’s business. Management evaluates the costs of such tangible and intangible assets and the impact of related impairments through other financial measures, such as capital expenditures, investment spending and return on capital. Therefore, the Company believes that these measures provide useful information to its investors regarding its performance and overall results of operations. EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities are not intended to be performance measures that should be regarded as an alternative to, or more meaningful than, either net income as an indicator of operating performance or to cash flows from operating activities as a measure of liquidity. In addition, EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities are not intended to represent funds available for dividends, reinvestment or other discretionary uses, and should not be considered in isolation or as a substitute for measures of performance prepared in accordance with GAAP. The EBITDA, adjusted EBITDA, adjusted net income and cash flow from operating activities before changes in operating assets and liabilities presented in this press release may not be comparable to similarly titled measures presented by other companies, and may not be identical to corresponding measures used in the Company’s various agreements.

General Reserve Information Notes:

Gulfport’s estimated proved reserves as of December 31, 2016 were prepared by Netherland, Sewell & Associates, Inc. (“NSAI”) with respect to Gulfport’s assets in the Utica Shale of Eastern Ohio and Gulfport’s WCBB and Hackberry fields and by Gulfport’s personnel with respect to its Niobrara field, overriding royalty and non-operated interests (less than 1% of its proved reserves at December 31, 2016), and comply with definitions promulgated by the SEC. NSAI is an independent petroleum engineering firm.

Investor & Media Contact:

Jessica Wills – Manager, Investor Relations and Research

jwills@gulfportenergy.com

405-252-4550

GULFPORT ENERGY CORPORATION

CONSOLIDATED BALANCE SHEETS

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GULFPORT ENERGY CORPORATION

CONSOLIDATED STATEMENTS OF OPERATIONS

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GULFPORT ENERGY CORPORATION

RECONCILIATION OF EBITDA AND CASH FLOW

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GULFPORT ENERGY CORPORATION

RECONCILIATION OF ADJUSTED EBITDA

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GULFPORT ENERGY CORPORATION

RECONCILIATION OF ADJUSTED NET LOSS

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