Gran Tierra To Trade On The American Stock Exchange

Gran Tierra Energy Inc. announced that its common stock listing application has been approved by the American Stock Exchange. This approval is contingent upon the company being in compliance with all applicable listing standards on the date it begins trading on the Exchange, and may be rescinded if the company is not in compliance with such standards. Gran Tierra Energy's common stock is scheduled to commence trading on the AMEX under the trading symbol "GTE" effective with the opening of the market on Tuesday, April 8, 2008.

The company's shares will continue to trade on the Toronto Stock Exchange under the symbol "GTE". Trading on the OTC Bulletin Board will cease upon initiation of trading on the AMEX.

"This is another substantial step forward for Gran Tierra Energy and our shareholders," stated Dana Coffield, Chief Executive Officer of Gran Tierra Energy Inc. "Listing on the AMEX will increase the visibility of the company to the financial community and allow us to continue to diversify our shareholder base. We fully expect our growing operational success to be better reflected and communicated with our listing on the American Stock Exchange," Coffield concluded.