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:
Don't know where the Garry's Mod folder is or how to extract zip files? See more useful installation tips.
ama_tarr<3ch, javierlaplace31, shadiaodiao, paredcristian54, ElReyTilin88, aliraqimutasim, menecerfadi, ah_ah_weave, CHAMOY, peecolo, elcuco:)XD, ArkyDuda, fierohernan, darielsebastianbeltrevargas, coftthegrr, daurypack23, hectormendezsuero, slothboy2077, NHẬT BẾP TRƯỞNG, buffdog1758, ju4nch0g4rz0n, hzmmhd0, geohander, alanymarsella1414, masascuate666, Hamzacık_144, ZeeroKX010, Tz, k13195579, Nikita, johnzenteno09, KEXY, vicenzocarozzi, ojiroaran2528, ZDHZH20-21, Gabrielz8500, walmart0954, xarab, oleg20090914, biftaylor45, llanso19, lilMaleno, moogelba7er $csgocases_com$, RG3x, Joseph Stalin | trade.tf, KokoMelon, [email protected], martinezromeroleon, gabrys240811, Nexus_76 +1247 others
