ttt_camel_v1.zip

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
          • readme.txt
          • ttt_camel_v1.bsp

• readme.txt
• ttt_camel_v1.bsp

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