Garry's Mod had Steam trading card support added on 12 July 2013. There are 9 cards in the series, and you'll receive 5 cards at random for purchasing and playing the game.
Trading Cards
Foil Cards
Badges
Level 1
Spammer
Spammer
Level 2
Crasher
Crasher
Level 3
Spawner
Spawner
Level 4
Builder
Builder
Level 5
Modder
Modder
Foil Badge
Creator
Creator
Booster Pack
Emoticons
:balloon:
(Common)
(Common)
:gmod:
(Common)
(Common)
:facepunch:
(Uncommon)
(Uncommon)
:melon:
(Uncommon)
(Uncommon)
:physgun:
(Uncommon)
(Uncommon)
:box:
(Rare)
(Rare)
:missing:
(Rare)
(Rare)
Profile Backgrounds
GM_Construct
(Common)
(Common)
Derp
(Uncommon)
(Uncommon)
Movie Creator
(Uncommon)
(Uncommon)
Rocket Man
(Rare)
(Rare)
Trouble in Terrorist Town
(Rare)
(Rare)
