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.
M O X I Ξ, Doomslam, Rellzy, Mist3rLuck, Halo 1080p, spielcontroller, NoName, Fedelefante BETS.gg, sagar, Cokacola, [VDDS] K.N.cfg @ Jeahy, 밀크|milk, the great papyrus, Sgt. B. Blackburn, SnowSmasher csgobig.com, ∂σɢє, Robin, derekSTUFF07, Sloth, Useless, DaZe Fungus, Nekros, ???, Alo0iis, ^0AllHacks^1NoSkill, syno04, wolfboydaalpha, Mr. Snow, Supah Maryoh Brudder, gtakiller33, nickles.101, 老貓 - TheOldCat, 老貓 - TheOldCat, VPG001, MAP갓시민, ThaCerealKillah, Alukard, 살선생, [FR]Sharky, [FR]Sharky, ✮✮Black Gold Saw✮✮, Bilbosandwiches, dowg, dowg, Broken_bones658, .onion, Toasty, www.andrews, sahoka, Binjuu +156 others
