I love Gmod. I dunno why people say it needs an update. The loading is a teeeny* bit slow but everything else is golden!
Awesome stuff! 
*About an hour
Reinstall from nothing ( rename gmod dir, delete local content, reinstall, don’t install any addons make sure you unsubscribe from all ) and then try.
I need to do the same thing because my computer has started freezing for 30 seconds to a minute when I join my dev server using dev build…