Best ways to decrease fps lag in gmod?

Launch options, fpsboost commands for a cfg file, anything. i dont mind how bad the game looks i just wanna see the highest fps i can get on my shitty pc

I would try installing the awesomium replacement addon found in the gamemodes/addons section. it allows you to enable multicore rendering and i get 80-100fps with it enabled

I can’t seem to find it on the workshop, would you mind posting a link?

Its not on the workshop … you need a DLL and it modifies the game.
http://forum.facepunch.com/showthread.php?t=1486313

Just heads up; some DHTML/HTML content won’t work.