Any way to reinstall Gmod???

Hello ive just downlaoded wire mod from www.garrysmod.org and i think it had a virus…My games have crashed for no reason so i thought “Hey i better remove the wire files!” and i did…but now my Gmod wont start…is there any way to unstall and reinstall Gmod???

Remove your garrysmod folder and start it via steam.

Ok thanks i will try it now.