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GPS Increases Footprint in Australia

Mergers & Acquisitions

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Great Plains Metals Corporation

Contact: Investor Relations Thursday, June 5, 2025

Phone (604) 684-2181 (No.2025-06-04)

GPS Increases Footprint in Australia

Vancouver, British Columbia – June 5, 2025 - Great Plains Metals Corporation ("GPS" or

"the Company", TSX-V: GPS, Frankfurt Exchange: 8VC) is pleased to announce the

signing of an Earn-in and Joint Venture Agreement (“Agreement”) with Godolphin

Tenenments Pty Ltd, a wholly owned subsidiary of ASX listed Godolphin Resources Ltd

(ASX: GRL), over the Yeoval Goodrich Project in New South Wales, Australia.

Key Terms

The Earn-in and Joint Venture Agreement allow for GPS to earn a 70% Project Interest

by completing the two milestones:

• 51% Project Interest, earned by making exploration expenditures of A$1m over a

12 month period to include a minimum of 500 metres of drilling;

• A further 19% Project Interest, earned by making further exploration expenditures

of A$1m over the subsequent 12 month period to include a minimum of 500

metres of drilling.

GPS will be focused on exploring for a potential discovery of a large tonnage porphyry

gold-copper system.

Yeoval Goodrich Project

The Project consists of two tenements, EL 8538 and EL 9243 (figure 1).

The Yeoval Project is located approximately 70 kilometres northwest of Orange in

central New South Wales. The tenements cover an area of approximately 290 square

kilometres. The area is underlain by granites, granodiorites and volcanics, and more

than 60 historic mine workings occur within the project. The project area is readily

accessible via sealed and unsealed roads and is adjacenet to railway infrastructure.

The Goodrich Mine is a historic copper gold mine and was a major producer between

1868 and 1912.

The many gold-copper showing in the Yeoval district have been explored almost

continuously since the 1960s, though mostly at shallow levels only, including completing

both reverse circulation (RC) and diamond drill holes. Most of this exploration was

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carried out prior to the Discovery 2000 airborn magnetics and radiometrics becoming

available for parts of the Lachlan Fold Belt including the Yeoval district.

Copper, gold and other base metal mineralization is widespread in the region and the

main mineralization styles include porphyry style gold-copper mineralization.

The Company is planning to publish a new website in due course under the domain

name www.greatplainsmetals.com.

Aidan Bishop, Director, commented:

“I am delighted that GPS has increased our footprint in Australia, a tier 1 mineral

jurisdiction, following adopting our new name to reflect our strategic focus. We have

recalibrated our portfolio to focus on drill ready exploration opportunities where a low

cost, rapid discovery model, can be applied. GPS believes that this approach offers the

most attractive risk reward basis for creating value for shareholders.

The Yeoval Goodrich Project is at the most advanced exploration stage of the projects

in our portfolio and we anticipate moving at pace to get on the ground and commence

work. I look forward to providing further updates to the market in due course.”

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Figure 1: Location of EL 8538 Yeoval and EL9243 Goodrich, within Yeoval.

Qualified Person: The scientific and technical data contained in this news release, has

been reviewed and approved by Douglas J. Kirwin, who served as the qualified person

(QP) under the definition of National Instrument 43-101.

GREAT PLAINS METALS CORP.

For further information, please contact:

Peeyush Varshney

Phone: (604) 684-2181

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Neither the TSX Venture Exchange nor its Regulation Services Provider (as that

term is defined in the policies of the TSX Venture Exchange) accepts

responsibility for the adequacy or accuracy of this press release.

Please visit us at www.norrlandgold.com