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.
ღAngelAD96シ, $Zippo$, A completely normal Sylveon, videla1, anti-pol, , chenchen6912, The_diams974, _6aHaH4uk_, exfirebr5, iliashishkin.pro, yamahonkawazuki, GAMEZA[TH], maxmclain1212, sir skitzo, Nwhis, dannyg896, jfcostonis, oohjie, chuckjoens11, Marty McWillis, www.noaiw159, ozike21, GoogyKush, V1ps, djaypancakez, J. Bio, JAN.HYMR, _MC_Gamer_, poi967, Biahwtrooper, OuRoBoRoS, OuRoBoRoS, ♥Pis♥I♥or♥, Darksied, MANDRACᅚᅚ, Jagger-Vazquez, Madex, spaceultimatefighter, .jbug, 13720051383, ☻║Twigzlet║☻, Mr.Genarix, yandere simulator, MedicMain2000, Sonic
