SAULT STE MARIE, ON--(Marketwire - Apr 20, 2012) - Great Rock Development Corporation (PINKSHEETS: [ GROC ]) reported today it has acquired gold mineral rights for 4200 acres of the Byers Brook and Shatter Lake claims of the Cobequid Highlands of Nova Scotia. In recent months the region has been the object of intense scrutiny because of discoveries of gold mineralization by Dr T.G. MacHattie of the Nova Scotia Department of Natural Resources ([ http://www.gov.ns.ca/natr/meb/data/pubs/12ofr01/12ofr01.pdf ]).

Great Rock Chairman Dr Luc C Duchesne said, "Mining exploration and mining are energy intensive processes. With the increasing cost of energy we predict that mining companies will show increasing needs for cost-effective energy solutions, which is at the center of the Company's core business. Discussions are underway with mining specialists for the establishment of a prospection plan in the near future and commence field work this summer."

Great Rock Development Corporation offers comprehensive design, development and management services to the Biomass, Solar Thermal & PV and Wind energy industry. The Company brings decades of energy consulting experience to the marketplace. Management's approach is aimed at rapid growth through partnerships, mergers and acquisitions using the principals' connectivity and experience in the marketplace.

For more information please visit: [ www.gridcs.com ]

Disclaimer: Shareholders and investors are strongly cautioned against placing undue reliance on information set forth in these communications in making any investment decisions concerning our securities. The matters set forth in this press release are forward-looking statements within the meaning of the "safe harbor" provisions of the Private Securities Litigation Reform Act of 1995. These forward- looking statements are subject to risks and uncertainties that may cause actual results to differ materially. These risks are detailed from time to time in the Company's periodic reports filed with the OTCMarkets.com including the company's Annual Report, Quarterly Reports and other periodic filings. These forward-looking statements speak only as of the date hereof. The Company disclaims any intent or obligation to update these forward-looking statements.