This download looks like a save. You need to place it in your saves folder inside the Garry's Mod 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.
huyuwei980426, hate1235.com, Brob 3:, ianreyes, Its 9 inches long ok, jaden, Arigoto, HiImPABLOHunter, lopezmalier17, banana jesus, beanergio, hehguy *******, trevonunger1, GG| Дон Яган4689, abutterfield04, flamingo, sonicexe1738, danieliusgg789, WERD DRAGOON hellstore.net, dv6819354, Pit_Hit, adorno77.ja, furkansametaltindas78, cookiepaw64, visovanistvanka12, noahheath9000, noahheath9000, monkopk, aleksandraspasova28, LeAllHolyWine, guidoguida20090708, toko, Declan, fatmandude454, kauamelobatista01, aidengolds, viu324, brycebandura, midalps, watashiwaldesugry, brook_is_arab, TrupidX-_-, Zenny Zen Zen, bungeeee, raffaay2, avrahamyakubov555, aqursoistv, justoleg45, gimdong486, jordanx2020 +382 others
