Vancouver, BC – GR Silver Mining Ltd. (“GR Silver Mining” or the “Company”) (TSXV|GRSL, OTCQB|GRSLF, FRANKFURT|GPE) – is pleased to announce additional high-grade silver (Ag) results confirming consistently wide Ag intercepts from underground diamond core drilling at the San Marcial resource expansion program, at the Plomosas Project, Sinaloa, Mexico. These assay results are from the fourth hole of an eight-hole program and indicate the widening of the mineral body at depth and along strike. The successful drill hole confirms a significant expansion of highgrade Ag mineralization approximately 170 m down dip below the lower limit of the San Marcial NI 43-101 mineral resource and approximately 70 m along strike, to the SE of hole SMI21-03 (see News Release dated January 17, 2022) (Figure 1).