This download looks like a lua file. You need to place it in your lua 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.
Unundying, Resam, mentrel.marie-jose, gucio9, kevinmostbeck8, DaemonWork, Enaeld, aseelhd121, [ϟϟ] TLG-EGL | CONFIG [ϟϟ], eFrog Krinez | csgoduck.com, GorAlex97, tippytoe018, ♥ l٥ﻻ ﻉ√٥υ♥ ☦, rubenvieira1979220, Lozatov, Fonda LeGrandFrenchRP, Ropedann, danny is nice, takat, Ft'BaàdBoys', robo-christopher2003, MrGaminG, rere62170, Jason | EYO hellcase.com, Trident, Server-Gamer, Server-Gamer, MrUDD, Rémy [Prompo], Cossmogamer, Ryan Leparq, TTH ❤ - CsBlood.com, garrysmods, ErenSkn, ✪☜Az a Segg ☞✪, Fabu2, Mulo.dev, [GER]Helmut Müller, 2682818382, MitchBruh, Mr.Gamer, Ironmader_, boyler121212, AllSchool, Oreal, Vanoss74, favvpo, bobiaps38, bobiaps38, ♰SD♰ ✞Zɛʟɖʀɨӄ✞ +45 others
