This download looks like a map. You need to place it in your maps 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.
Err0rSama, masascuate666, fatalbeautil4, pasmoluiso, mbraisby21, alex_loner, peterhart662, ELiTECHiCKEN, doge, ragulina82, bekcibasi347, Masten, commander shepard, sashia4409, Armor busters, dizbasarov73, lucasmichel77540, boba2334, faeries77, arseniydonetsk5, ☣COMRADE☭AZAZEL☣, SaraKral94, zhYzhA, modelína, mrsummer2008, lyblena.asgrig, Mr.Shampoo DAPUBG.com, ryanjamestowry, dunno6376, https://vk.com/makar1337, ALEKSEY, d.lukasz05, ethan.dubos59, sirotstudio1, Cr4wler, Krzychxxx, ryan2000836, ryan2000836, ldesbruslais, Glasgow-Scotland-Dave, minegamer867, JChan1354, Cpt.jeffey 2486, Ello I Admin said WL is special, BigMike, JackyMicheMiche, BOS_Sentinel, sdjalali1974, Saysay111, theAwesomeSponge +20 others
