GSP Resource Corp. Mobilizes for 2026 Drilling Program at Alwin-Mer Properties

Vancouver, British Columbia — June 3, 2026 — Leads & Copy — GSP Resource Corp. has mobilized field and drill crews for the initial phase of its 2026 drilling program at the Alwin-Mer properties in British Columbia's Highland Valley Copper Camp. Drilling is expected to begin within the next seven days, targeting porphyry copper potential at the Mer property and following up on a gold discovery at Alwin in late 2024. The first phase of drilling is anticipated to cover between 1,200 and 1,500 metres.

At the Alwin high-grade gold target, Phase 1 drilling will follow up on a late 2024 discovery in step-out hole AM-24-06, which returned 5.04 grams per tonne (g/t) Gold (Au) and 1.01% Copper (Cu) over 7.90 metres, including 22.93 g/t Au and 1.82% Cu over 1.64 metres. The Alwin Project currently hosts an inferred mineral resource of 1.46 million tonnes (Mt) with an average grade of 1.08% Cu, equating to 34.6 million pounds of Cu. While Alwin has long been known for potentially significant silver and gold values, historical assay data for these metals has precluded their inclusion in resource estimations. The new discovery in hole AM-24-06, located 40 metres below the current resource pit shell, presents an opportunity to enhance existing open pit and underground mineable copper resources with high-grade gold values.

Significantly, high-grade gold values in AM-24-06 were found within a 1.64-metre core width interval, which includes an individual sample of 0.84 metres assaying 35.1 g/t Au, within the interpreted hanging wall of a broader 7.9-metre core width copper-gold-silver zone. The presence of high-grade gold values below the vertical projection of existing “3 Zone” modelled copper resources supports the Company's view that these distinct mineralization styles are structurally and genetically linked and can be effectively targeted within the Alwin Mine geological model. This high-grade gold mineralization is visually distinct from broader copper zones and is associated with intense black chlorite-sericite alteration.

As part of the initial 2026 drilling phase, GSP plans to step out and potentially expand the footprint of the high-grade gold mineralization identified in AM-24-06. The drilling aims to test laterally and vertically beyond AM-24-06 to confirm the structural setting and extend the depth of drill holes, testing additional modelled copper lodes within the structural footwall to the north, which are considered equally prospective.

GSP also plans to drill a new porphyry target at the Mer property, defined by a compilation of historical drilling data and recent rock and grid soil sampling. Follow-up sampling at Mer targeted an area of historic drilling and identified an approximately 175 x 120-metre copper anomaly that remains open to the northwest. Rock sampling at the historic Mer showing yielded 12 samples with copper content ranging from 0.14 to 1.02%, averaging 0.4% Cu. TerraSpec® analysis indicated paragonitic muscovite and magnesium-iron chlorite compositions, suggesting a higher-temperature proximal porphyry environment.

The Mer Property, comprising 185 hectares in the Kamloops Mining Division, is located approximately 1.5 km northwest of GSP's Alwin Mine Project and is surrounded by Teck Resources’ Highland Valley Copper claim group. The property hosts a copper exploration target zone northwest of the Alwin Mine high-grade copper-silver-gold target zone. The permit allows for an initial year-one diamond drilling program, followed by permitting for surface disturbance to support anticipated expansion drilling within the subsequent four years. The property is accessible via existing logging roads, where prior logging and trenching have exposed copper mineralization at surface.

Historical exploration on the Mer Claims by Cleveland Mining & Smelting Co. Ltd. between 1965 and 1971 included geochemical and geophysical surveys, mapping, trenching, 16 percussion drill holes totalling 610 metres, and one 150-metre diamond drill hole. Percussion and diamond drilling reportedly defined a 70 x 120-metre northeast trending porphyry copper-molybdenum zone characterized by disseminated chalcocite, chalcopyrite, bornite, and molybdenite mineralization, along with biotite and sparse potassic alteration. At the Mer showing, historical percussion drill holes returned values of 9 metres averaging 0.47% Cu, 30 metres averaging 0.53% Cu, 15 metres averaging 0.50% Cu, and 21 metres averaging 0.51% Cu. A single diamond drill hole intersected a zone of chalcocite mineralization within biotite and potassic altered granodiorite intrusive rocks, averaging 0.29% Cu over 24 metres. The mineralization zone remains open to the north and west. Given the presence of drill-confirmed porphyry copper-molybdenum mineralization, its location approximately 6 kilometres west of the Valley Pit at Teck Resources' Highland Valley Copper Operations, and its position within the Guichon Batholith, the Mer Project is considered a high priority for follow-up exploration.

Scientific and technical information in this news release has been reviewed and approved by Kristopher J. Raffle, P.Geo. (B.C.), principal and consultant of APEX Geoscience Ltd., a consultant to the Company and a qualified person as defined in National Instrument 43-101. Mr. Raffle has verified the data, including the sampling, analytical, and test data supporting the information and opinions presented. Mineralization hosted on nearby properties is not necessarily indicative of mineralization that may be hosted on the Alwin property.

GSP Resource Corp. is a mineral exploration and development company focused on projects in southwestern British Columbia. The Company holds 100% interest in the Alwin Mine Copper-Gold-Silver Property and the Mer Property in the Kamloops Mining Division, as well as the Olivine Mountain Property in the Similkameen Mining Division.

Source: GSP Resource Corp.