Gma_tools.exe

Ensure your folder contains a valid addon.json file with the necessary metadata.

Find your .gma file (typically located in your garrysmod/addons or workshop/content/4000 folders). Open or the Garry's Mod Addon Tool (GMAT) . gma_tools.exe

: Many versions allow you to simply drag a .gma file onto the executable to trigger extraction automatically. How to Use GMA Tools Extraction : Ensure your folder contains a valid addon