hexed_tf2_heavy_coach_skin_pac by Jason278

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
          • Hexed TF2 Heavy Coach skin pack <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• Hexed TF2 Heavy Coach skin pack/
  • materials/
    • models/
      • Coayer/
        • hvyweapon/
          • eyeball_l.vmt
          • eyeball_r.vmt
          • heavy_head.vtf
          • heavy_head_blue.vmt
          • heavy_head_blue.vtf
          • heavy_head_red.vmt
          • heavy_head_red.vtf
          • hvyweapon_blue.vmt
          • hvyweapon_blue.vtf
          • hvyweapon_hands.vtf
          • hvyweapon_red.vmt
          • hvyweapon_red.vtf
      • L4Dpons/
        • c_items/
          • chocolate.vmt
          • chocolate.vtf
          • chocolatebump.vtf
        • v_shotgun/
          • v_shotgun.vmt
          • v_shotgun.vtf
        • w_shotgun/
          • w_shotgun.vmt
  • models/
    • Coayer/
      • heavy.dx80.vtx
      • heavy.dx90.vtx
      • heavy.mdl
      • heavy.phy
      • heavy.sw.vtx
      • heavy.vvd
    • L4Dpons/
      • c_models/
        • c_sandwich/
          • c_sandwich.dx80.vtx
          • c_sandwich.dx90.vtx
          • c_sandwich.mdl
          • c_sandwich.phy
          • c_sandwich.sw.vtx
          • c_sandwich.vvd
      • w_models/
        • w_shotgun.dx80.vtx
        • w_shotgun.dx90.vtx
        • w_shotgun.mdl
        • w_shotgun.phy
        • w_shotgun.sw.vtx
        • w_shotgun.vvd
  • settings/
    • spawnlist/
      • Hexed Coach Heavy pack.txt

Nekyto, Nekyto, Warren's Fuck-Bunker, Russell Lightbourne, LoG4, Ashir_PL, Ashir_PL, PsyKoTMK, senka02, Yum Yum Man, SirTalis, Blaze, Legoben2, Billy Shears Gaming, Warpath-The-Laughing-Swordfish