CALGARY - Gran Tierra Energy Inc. ('Gran Tierra' or the 'Company') (NYSE American: GTE) (TSX: GTE) (LSE: GTE) today announced that Gran Tierra Resources Limited ('GTRL'), a wholly owned subsidiary of Gran Tierra, has procured private purchasers for the sale by GTRL of an aggregate of 137,093,750 common shares of PetroTal Corp. at a price of US$0.2198 per Purchased Share, for an aggregate purchase price of approximately US$30.1 million.

The price of US$0.2198 per Purchased Share represents an approximate discount of 10.8% to the closing price of the common shares of PetroTal on November 25, 2021 on the AIM Market of the London Stock Exchange.

Gran Tierra intends to use the proceeds of the sale of PetroTal shares to pay down debt and for other general corporate purposes.

Contact:

Gary Guidry

Tel: +1-403-265-3221

Email: info@grantierra.com

About Gran Tierra Energy Inc.

Gran Tierra Energy Inc. together with its subsidiaries is an independent international energy company currently focused on oil and natural gas exploration and production in Colombia and Ecuador. The Company is currently developing its existing portfolio of assets in Colombia and Ecuador and will continue to pursue additional new growth opportunities that would further strengthen the Company's portfolio. The Company's common stock trades on the NYSE American, the Toronto Stock Exchange and the London Stock Exchange under the ticker symbol GTE. Additional information concerning Gran Tierra is available at www.grantierra.com. Information on the Company's website does not constitute a part of this press release. Investor inquiries may be directed to info@grantierra.com or (403) 265-3221.

Forward Looking Statements and Legal Advisories

This press release contains opinions, forecasts, projections, and other statements about future events or results that constitute forward-looking statements within the meaning of the United States Private Securities Litigation Reform Act of 1995, Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and forward looking information within the meaning of applicable Canadian securities laws (collectively, 'forward-looking statements'). The use of the words 'expect', 'will,' 'intend' and similar terms identify forward-looking statements. In particular this press release contains forward-looking statements regarding the closing of the sale and the use of proceeds therefrom. The forward-looking statements contained in this press release are based on certain assumptions made by Gran Tierra based on management's experience and other factors believed to be appropriate. Gran Tierra believes these assumptions to be reasonable at this time, but the forward-looking statements are subject to risk and uncertainties, many of which are beyond Gran Tierra's control, which may cause actual results to differ materially from those implied or expressed by the forward looking statements. Gran Tierra disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as expressly required by applicable law.

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