Gunnison Copper Project PEA Technical Report Reporting Post-Tax NPV8 of ~US$2.0 Billion and IRR of 22.5% is Now Filed

Phoenix, Arizona--(Newsfile Corp. - March 31, 2026) - Gunnison Copper Corp. (TSX: GCU) (OTCQB: GCUMF) (FSE: 3XS0) ("Gunnison" or the "Company") has filed the National Instrument 43-101 technical report (the "Technical Report") with an effective date of March 18, 2026 for the updated Preliminary Economic Assessment ("PEA" or "2026 PEA") on its 100%-owned Gunnison Copper Project located in the Cochise Mining District, Arizona, United States (the "Project"). The Technical Report is available on SEDAR+ (www.sedarplus.ca) under the Company's issuer profile and on the Company's website.