A maximum sized, high altitude map dedicated entirely to the construction and combat of flying machines. Can be found in your "other" maps folder.

to install, just cut and paste the the bsp file into your: garrysmod/garrysmod/maps

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_altitude.bsp

Don't know where the Garry's Mod folder is or how to extract zip files? See more useful installation tips.

  • gm_altitude.bsp