e2_pack_by_[cg]_sugarsweet.zip

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
          • Expression2 <-- Addon folder!
            • e.g.
            • lua
            • maps
            • materials
            • models
            • etc

• Expression2/
  • my e2's/
    • aimer Test e2.txt
    • car turning.txt
    • cube invasion.txt
    • e2 keypad.txt
    • GM_flatgrass model.txt
    • Jurkey holo.txt
    • level 1 sentry e2.txt
    • Maddy's NPC Programmer.txt
    • no noclip =).txt
    • portalgun e2.txt
    • snake e2.txt
    • Southpark kenny.txt
    • Trail holo.txt
    • Whip e2.txt
    • _autosave_.txt
    • _shutdown_.txt
  • not my e2's/
    • car_e2.txt
    • Castle Hat.txt
    • chip 2.txt
    • cube.txt
    • drone 2.txt
    • edit_me!.txt
    • fairy_v1.txt
    • holo_jet_above_head.txt
    • killer.txt
    • kills_all_players.txt
    • makes_all_players_blind.txt
    • pokemon ball e2/
      • Expression2/
        • pokemon_ball_made.txt
    • sky_walker.txt
    • suit ne weps.txt
    • trap 2.txt
    • _autosave_.txt
    • _shutdown_.txt
• Read me.txt

s1zzle, MASLO1337, dhg, brin900, Diego.Radriges., jpsl00, BlackMonkey, Mob1234, Whollyspokes, quentinous1, Winter Woonski, PinkPitbull #Shadowz, LeTueurBronieDu66, ApoSa, ApoSa, ╰☆╮ sarah ╰☆╮, Zadix, Totoron, Eamon, skillz., Jeffrey, ♣ГАМБИК GAMING♣, ♣ГАМБИК GAMING♣, <@>, rtrdok, rtrdok, LunSable, Adoring Fan, ʙɴɢ.Vinilelul, ʙɴɢ.Vinilelul, Mr.Chips, Caleb, gosts, BoB, Dare, Dare, A.R.C.A.D.E. JEFF, A.R.C.A.D.E. JEFF, тѕсм.[SG-1] Teal'c