Gurupi

The Gurupi Project, previously referred to as CentroGold, is a large-scale gold project located in northeastern Brazil. It spans roughly 2,100 km² along an 80 km mineralized belt. Within this district, three primary open pit deposits, Blanket, Contact and Chega Tudo, have been identified. As at year-end 2025, the project hosts a NI 43-101 compliant mineral resource of approximately 1.83 Moz of gold in the Indicated category and 0.77 Moz of gold in the Inferred category.

Gurupi was acquired from BHP in December 2024 and is considered a highly prospective but underexplored asset. With a strong geological foundation, extensive historic drilling and a large underutilized land package, the project is positioned as a central growth lever in G Mining’s development strategy. G Mining has allocated approximately US$21 million to Gurupi in 2026 for exploration and study work, with a focus on resource expansion ahead of a Preliminary Economic Assessment expected in the second half of 2026.

In July 2019, the previous operator released a pre-feasibility study outlining a 10 year mine life and average annual gold production of 190 koz to 210 koz during the first two years of operation. G Mining has since relaunched exploration drilling at Gurupi, including 19,000 m of RC drilling to test lateral extensions of mineralization along Chega Tudo and Cipoeiro and 13,000 m of diamond drilling to test extensions at Cipoeiro, with drilling having started in the fourth quarter of 2025.

Metalla holds a 1% NSR royalty on the first 500 koz gold produced, 2% NSR royalty between 501 koz and 1.5 Moz gold and a 1% NSR royalty thereafter.