Hey all! I don’t know is this a good place to post this, but I’m gonna do it anyway because I’m new on the forums.
Okay, so I had this engine error while starting g-mod and there was a text which said to report if someone fixes it. I restarted my steam and I right clicked on steam icon and did “Run as Administrator”. After that, I could play without any problems my g-mod. I also had problems with my Civilization 5, and running steam as an admin also helped me.
I hope I helped little bit.
-Kindly regards, Dominik