Not loading in?

[Mullin]

Right, so I get so far into downloading models up to 'bloodpuddle1' and then it gets stuck, I wait and wait and wait and it doesn't do nothing.

 

[Votra]

This requires a clean install.

To do that,
Go to your Steam Library.
Right-Click Garry's Mod.
Hit Properties.
Navigate around until you find, "Go to Local Game Files."
Go there.
Delete everything.
Back to your GMod properties.
"Delete Local Game Content"
Clean out your Recycle Bin.
Reinstall.

Profit.