VANCOUVER, BC, July 15, 2020 /CNW/ – GR Silver Mining Ltd. (TSXV: GRSL) (FRANKFURT:GPE) (OTCQB: GRSLF) (“GR Silver Mining” or the “Company”) is pleased to announce that it has started a surface drilling program at its 100%-owned Plomosas Silver Project (“Plomosas Project”) in Sinaloa, Mexico. The Company has mobilized three drill rigs, with one rig already on site