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

• krystalFTW/
  • materials/
    • models/
      • bvixen/
        • Body.vmt
        • Body.vtf
        • Bodyn.vtf
        • eyeball_l.vmt
        • eyeball_r.vmt
        • head.vmt
        • head.vtf
        • headn.vtf
        • pupil.vtf
  • models/
    • bvixen.dx80.vtx
    • bvixen.dx90.vtx
    • bvixen.mdl
    • bvixen.phy
    • bvixen.sw.vtx
    • bvixen.vvd

my.little.pony.and.dinosaur, sampistola, risoskol, Candy_the_cat2, yutsamon, Aquila Ursus, Delsemon, MADWOLF, MADWOLF, Riha.Jarous, grantdg1989, deidarasen666-2, Halo44327, Gagnetar, Super Ratchet Limited, Agent_Jd, [LJ2k] Lightning Judy 2020