This download looks like an addon. You need to extract the downloaded zip and put the addon folder in your Garry's Mod addons 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.
jam.joseadolfo.mendoza, it's past your bedtime, 牛逼, Endless_List, PuffZor, sᴋʏ,ʟ1ɢʜᴛ., azxcvb15, duranruizjoanantonio.gr, Max_XDimYT, Jonatas1554, maximuslim2oo9, baganemmanuel4, L + Ratio + Skill Issue, Miner 49'er, ŤĤĕ···ĶįĽĽěŔ, menecerfadi, nemar123kill, jhoanxd12, mensajerodelgrankriterys, ankulol66, alexander141312, jacaridad20132011, jacaridad20132011, Kris_KP, [B]asylko, Lil Ragnar, LOL_manerz, 76561199274759734, NearWanna, tafara7958, jessicaluz366, samueldylon161, rasystem2030, Вeryший, romyc1984a, romyc1984a, monir, reeetailroad, Василич, pica pau do egoismo, csabusab, seba2017segundario, Alex, manusze KEYDROP, danielabalice02, lionelver1221, Resistλnce Member⁰⁷, ᴍᴀᴛᴇꜱᴢ, agustinmariano505, agustinmariano505 +492 others
