Great Plains Metals Announces Board Changes

Vancouver, British Columbia – June 17, 2025 - Great Plains Metals Corporation ("GPS" or "the Company", TSX-V: GPS, Frankfurt Exchange: 8VC) is pleased to announce that Douglas Kirwin has been appointed to the board of directors of the Company.

Doug Kirwin is an Australian geologist with over 50 years of international exploration experience. He commenced his career in Papua New Guinea with Anglo American in 1970 and later worked for AMAX in southeast Asia, Mexico and the Pacific. From 1985 to 1995 Doug formed an independent consulting company mostly working in southeast Asia. Subsequently, he was executive Vice President for Ivanhoe Mines from 1996 to 2012. Since that time, he continues to enjoy the rocks with a “friends and fun” caveat. Doug has an MSc in mineral exploration from James Cook University and enjoys contributing to the Society of Economic Geology student programs and field trips, and working with young professionals.

The Company also announces the resignation of Anders West from the board of GPS effective immediately. The Company would like to thank Mr. West for his time serving as a director.