When I import a gmod animation (doesn't matter which, all act the same) as itself, with no rig, the skeleton/animation are perfectly fine (for example).
However, when I import the animation onto a rig (such as a CSGO model or a gmod reference rig), the whole thing skews up (picture).
I got the gmod animations from here
and downloaded them from here.
Do I need to mess with the Qc? - I have no idea how to touch anything related to Qc.