GR Silver Mining Ltd. reported results from the current drilling program in the San Juan Area, as well as new sampling results from historic drilling, also at San Juan, within the 100%-owned Plomosas Silver Project ("Plomosas Project") in Sinaloa, Mexico. The high-grade Ag intersections in the San Juan Area, as confirmed by the drilling, define a predominantly Ag-rich epithermal system. Recent work by the Company indicates that the San Juan Area appears to be a highly prospective epithermal system, supported by field reconnaissance, which has identified several shallow precious metals-rich old workings. The San Juan Area contains a 2 km long north-south trending epithermal system parallel to the vein system in the Plomosas Mine Area. Results of drilling at the San Francisco Vein indicate a north-south trend with a series of outcrops exhibiting multiple phases of veining, stockwork and brecciation. These outcrops are located approximately 200 m south of the San Juan Vein, indicating an opportunity for expansion of the mineralized system along strike. These very encouraging drill hole results not only confirm the presence of high-grade Ag-predominant epithermal veins at the San Juan Area, but also open up the opportunity for additional continuity of the mineralized trend to the south. The potential to increase the strike of the mineralization from the existing 2 km to 4 km and achieve new discoveries is still conceptual in nature. However, recent field mapping and sampling provides strong support for a 4 km long structural corridor. GR Silver Mining believes that Plomosas represents a district-scale project. The Company is carrying out a 10,000 m diamond core drilling program and plans to complete a resource estimation in two areas (Plomosas and San Juan) in the second quarter of 2021. Work to date has already resulted in success in expanding the known zones of mineralization within these two areas. The Plomosas Mine Area displays evidence of a 600 m long epithermal system, potentially extending up to 1.2 km, where multiple veins and discoveries have so far defined a much larger high-grade Ag and Au mineralized footprint. Through surface exploration and drilling, the San Juan Area, initially thought to consist of only one 400 m long epithermal vein, now appears as a 2 km long epithermal system, with at least six epithermal veins. The Plomosas Mine Area and San Juan Area, currently undergoing resource estimations, each have a geological footprint similar to the nearby San Marcial Project, where the company has estimated a NI 43-101 resource of 29 million ounces Ag (Indicated) and 10 million ounces Ag (Inferred). The NI 43-101 resource represents only the initial 500 m long structural corridor, part of a 6 km trend under exploration inside the San Marcial Project. The integration of the Plomosas Project and the San Marcial Project, together with concessions under acquisition located between them, provides the company full control of all major structural corridors on the eastern edge of the Rosario Mining District. GR Silver Mining will continue to explore new mineralized zones close to the surface in the remaining part of the exploration concessions in 2021, supporting constant resource growth. Quality Assurance Program and Quality Control Procedures ("QA/QC"): The Company has implemented QA/QC procedures which include insertion of blank, duplicate and standard samples in all sample lots sent to SGS de México, S.A. de C.V laboratory facilities in Durango, Mexico, for sample preparation and assaying. For every sample with results above Ag >100 ppm (over limits), these samples are submitted directly by SGS de Mexico to SGS Canada Inc. at Burnaby, BC. The analytical methods are 4-acid Digest and Inductively Coupled Plasma Optical Emission Spectrometry with Lead Fusion Fire Assay with gravimetric finish for silver above over limits. For gold assays the analytical methods are Lead Fusion and Atomic Absorption Spectrometry Lead Fusion Fire Assay and gravimetric finish for gold above over limits. The recent drill holes, completed by First Majestic from 2016 to 2018, followed QA/QC protocols reviewed and validated by GR Silver Mining, including insertion of blank and standard samples in all sample lots sent to First Majestic's Laboratorio Central facilities in La Parilla, Durango, for sample preparation and assaying. Additional validation and check assays were performed by an independent laboratory at SGS de México, S.A. de C.V. facilities in Durango, Mexico. The analytical methods applied for these recent holes for Ag and Au assays comprised of Fire Assay with Atomic Absorption finish for samples above Au >10ppm and Ag >300ppm and Gravimetric Finish. Lead and Zn were analyzed using Inductively Coupled Plasma Optical Emission Spectrometry. GR Silver Mining has not received information related to the Grupo Mexico QA/QC and assay protocols and at this stage is considering the information historic for news release purposes.