dod_usmc_camo_re-skin.zip

This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons folder. You should end up with a directory structure similar to below:

• steamapps
  • common
    • garrysmod
      • garrysmod
        • addons
          • USMC DoD Re-skin <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• USMC DoD Re-skin/
  • materials/
    • models/
      • player/
        • american/
          • american_body.vmt
          • american_body.vtf
          • american_body_exp.vtf
• README.txt

Yeyonathor, dragonlucas13, [OKLM]Manu™, gabimagloviti, andiavello, Estevan F., chadthomassonlol, Knight, M3 Luck3y Charms, 13720051383, 사이다