2009 Bugatti Veyron Sang Bleu by Mr. Ritzu

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
          • data <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• data/
  • pac3/
    • 2009 Bugatti Veyron Sang Bleu.txt

mineturo34, ANGELITO7W7, luiscrack12310, mousemouse.you, t23959289, nano1997vip, Poopieoof_336, Baridkefard, DARK_WOLF, anthonycordovac.23, mau992302, jhanpeara, emaproo500, rrrm9289, ElcherryRDJ, godamostafa128, Ultragodop, El POCHANGO, Denisz, brayansitogamer738, nasimbenbah06, il ladro, leon7001, Victor h1g, GrantBeta, luisfquevedod, magdaismail653, galaxisv1215, mechamecha, , arman2000zula, cristianalessandronicolae, testacckk515, harounbel1971, acosta4112010, lopezcucjosue12, luisdavidlopezportillo, jjjb891, opzilk, fromerosequeira, bogadovanesa156, [8b10e3]bego3311, Blandy Candy, leeysioson, jesusema989, vallejosmith3454, pbozek827 lolo, emirtalhaharmantepe, nemar123kill, cacereslautaro999 +4767 others