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.
Pompo le pompiste, Saiba, christopher.valdez008, HubbanTrubban, kupskuk, azazelkoza, cedreamzwork, Ubermorph007, fuemak2011, loureirochristian92, trumpy303, ATR, void, ุR, maxi_the_neko_UwU100, Pupperito, Big Spud, Big Spud, Beerus, Douk Nouk Kem, SAIRA, Ivy Winters, mossesx, FFSoul, gabi020314, rtkzvanoss, Cysti, Fiore, Tiberius236, Steven Senegal, Steven Senegal, Snake Mistake.j2, vladdengyd, Codywest2005, unclebody, ╰☆☆-, tiptopspin, Mr. C, Or Something, Vantonio Vandarez, Prisky, mattpeckron98, Monster_Cat, SCREAMOguy413, mister.avksentev, Shock44, Edgar Realistic Battle Damage, YTub/MisixGaming, bautista13angelica, The Teleporting Fish, Binary Wolf +47 others
