Map pack addon - Garrys Mod for Half-Life 2 - ModDB

A mappack for Garrys mod 9 various maps and also a few vehicles. Inside the archive are other archives from where the different maps only have to be extracted into your \gmod9\ directory.

Steam Workshop::gmod realism collection (maps, guns, effects etc.)

Gmod-Mod-Pack 7 addon - Garrys Mod for Half-Life 2 - ModDB

Steam Workshop::Half Life 2 Remake

Garry's Mod, Half-Life Wiki

Steam Workshop::Half Life 2 Beta Map Collection

Steam Workshop::Half Life 2: Aftermath Map Pack

Mods, Half-Life Wiki

Garry's Mod: Half-Life 2 Beta Add-Ons! (Characters, Maps, Weapons, etc.)

Half-Life 2 Campaign [Garry's Mod] [Mods]

Scary Horror Map Pack (GMOD 12-13) addon - Garry's Mod - IndieDB

The DEFINITIVE Half-Life 2 Weapon Pack..

Steam Workshop::E3 2003 Pack