gm_tankmania.zip by meat pocket

This download looks like a map. You need to place it in your maps folder inside the Garry's Mod folder.

You should end up with a directory structure similar to below

• steamapps
  • common
    • garrysmod
      • garrysmod
        • maps
          • gm_tankmania.bsp
          • Ny mapp/
            • gm_tankmania0001.jpg

• gm_tankmania.bsp
• Ny mapp/
  • gm_tankmania0001.jpg

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