Guyana Frontier Reports Appointment of Vice-President, Exploration

VANCOUVER, June 5, 2012 /CNW/ - Guyana Frontier Mining Corp. ("Guyana Frontier", or the "Company") reports that Mr. Stephen Wallace, P. Geo. has been appointed Vice-President, Exploration for the Company, effective June 1, 2012. Mr. Wallace brings over 25 years of experience in the mining and mineral exploration industry to Guyana Frontier. He has managed exploration programs in many geological environments, and has supervised the delineation and advancement of gold deposits. Mr. Wallace recently served as Vice-President of Exploration for Trade Winds Ventures Inc. until it was acquired by Detour Gold Corporation by way of a plan of arrangement in December 2011.

Guyana Frontier welcomes Mr. Wallace to its management team and looks forward to his contribution to the Company's exploration projects.

About Guyana Frontier

Guyana Frontier is a public mineral exploration company listed on the TSX Venture Exchange (TSX-V: GYG), and is focused on the exploration, discovery and development of precious metals deposits located within Guyana, South America. Guyana Frontier began acquiring interests in Guyanese exploration properties in 2007, and now holds various rights to obtain working interests in approximately 342,000 acres (138,400 hectares) of prospective lands. Guyana Frontier's main exploration asset is the Marudi Mountain Gold Project, which was the subject of extensive historical exploration, and has recently been the focus of a diamond drilling program. Guyana Frontier's goal is to develop a significant gold resource at the Marudi Mountain Gold Project, and to explore its other Guyanese projects using funding from exploration partners.

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Forward Looking Statements

This news release contains forward-looking statements that are based on Guyana Frontier's current expectations and estimates. Forward-looking statements are frequently characterized by words such as "plan", "expect", "project", "intend", "believe", "anticipate", "estimate", "suggest", "indicate" and other similar words or statements that certain events or conditions "may" or "will" occur, and include, without limitation, statements regarding Guyana Frontier's plans with respect to the exploration and development of its projects. Such forward-looking statements involve known and unknown risks, uncertainties and other factors that could cause actual events or results to differ materially from estimated or anticipated events or results implied or expressed in such forward-looking statements. Any forward-looking statement speaks only as of the date on which it is made and, except as may be required by applicable securities laws, Guyana Frontier disclaims any intent or obligation to update any forward-looking statement, whether as a result of new information, future events or results or otherwise. Forward-looking statements are not guarantees of future performance and accordingly undue reliance should not be put on such statements due to the inherent uncertainty therein.

about Guyana Frontier, please visit our website at www.guyanafrontier.com or contact Warren Stanyer, President and CEO, at [phone].