August 10, 2015 - Gold Bullion Development Corp. (TSX-V: GBB) (OTCPINK: GBBFF) (the “Company” or “Gold Bullion”) confirms that the Company has earned a 1% Net Smelter Royalty (NSR) from Castle Silver Mines Inc. (“Castle Silver”) by meeting the conditions of the Net Smelter Royalty Agreement dated July 1, 2012. To meet those conditions the Company has expended $1 million over the three-year period from July 2012 through June 2015 on the development of properties held by Castle Silver.