L4D Mall (working on Gmod)

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:

• steamapps
  • common
    • garrysmod
      • garrysmod
        • addons
          • Mall <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• Mall/
  • maps/
    • l4d_Mall.bsp
  • info.txt
• Readme.txt

sonic, The Unusual Sandwich, joalalfred21, Noel_RD14, Veloci_YoShi, tjay259, robertsjoey7, morgan203, STEVEN UNIVERSE, AndroAndro282, cameronwhitehead028, RickDracul, karlogutierrezmusic, danksteviee, ☣el chavon☣, LeonBeast8YT, saylor, the.great.phitus, the.great.phitus, www.harrymuter, uhnoo, Mr.Jack, sexylady89234, ShadowZyaneHeaven, residentevilfan27, Pino13, Spindash Derp, ToyChica, jonathan.surfsup, SpanArk(On xbox one), re15revisited, re15revisited, Asriel Dreemurr, dantegonzalez7, gaben newell, Animator ITA, zugezockt22, jaro_3, jamaluddin.matsupi, sharath507, y.chouchane, HyphenTorpedo, slexxvo, devindasrath, jacksonrugh, •KinD•AnimaL | kickback.com, zombiedean6, A.J Marieson, manlecj, Giant Master Rat +125 others