Yup. It's a pretty silly issue. I've reported things like this to the GMOD devs, they acknowledge mounting issue, just waiting on fixes. I'll do what I can in the mean time to see if I can get around it.
In the mean time, you can attempt to fix this by going into garrysmod/download/models/shells/ and deleting the files in there.
Actually I just made an update to the pack this is in, lets hope it fixes that.
In the mean time, you can attempt to fix this by going into garrysmod/download/models/shells/ and deleting the files in there.
Actually I just made an update to the pack this is in, lets hope it fixes that.