Half-Life 2 content is the "DNA" of Garry's Mod. Whether you’re building a massive physics contraption or filming a Machinima, having a clean, fully-mounted set of HL2 assets is the first step to a stable game.
A list of "Mountable Content" will appear. Ensure the boxes next to Half-Life 2 and its episodes are checked. half life 2 gmod content
This adds hundreds of static props found in the HL2 maps that weren't originally available in the GMod spawn menu. Half-Life 2 content is the "DNA" of Garry's Mod