Garry's Mod 1 file - Garrys Mod for Half-Life 2 - ModDB

The earliest version of Gmod, with gm_construct. You also need 7zip to open the folder.

Steam Workshop::HL2 Campaign Enhancements

How a 'total accident' led to Garry's Mod's funniest feature and 15 years of twisted success

Garry's Mod NPC Enhancements [Half-Life 2] [Mods]

Flatout Mega Pack file - Garrys Mod for Half-Life 2 - ModDB

HL2 Episodic animation fix [Garry's Mod] [Mods]

for some reason, barney and gman (from hl2 npc's) are stuck as hl source models even though I don't have source installed or any mods that would do that, does anyone know

Banana Bomb !! file - Garrys Mod for Half-Life 2 - ModDB

Steam Workshop::Half Life: Alyx - Garry's Mod Collection (+16)

Mods, Half-Life Wiki

Gmod-Mod-Pack 3 addon - Garrys Mod for Half-Life 2 - ModDB

Realistic Half Life: Source Sweps addon - Garry's Mod - IndieDB

Half-Life: Alyx styled pistol [Garry's Mod] [Mods]

JBMod - Valve Developer Community