GMod Broken

So my gmod is broken aka some maps skybox and lighting are completely fucked.

In Construct i spawn and the skybox is gone but when i look at North West it starts to appear same
with desert bus map except i cant tell if skybox is missing but the lighting is fucked for both of them and it sucks
if there is any fix please tell me i unmouted CSGO days ago and didnt have problem and i verified game cache

try to factory reset gmod [open up FactoryReset-GMod.bat in your GarrysMod folder] and reinstall it.
and delete any remaining cache.

make sure you backup your dupes and stuff before starting that bat