Optimization

Since Garry's Mod is not that well optimized, what are your tips & tricks to make it run better for a server?

Install a small map and dont use too many addons cos sometimes it causes

lower ur graphics, dont have much addons, or just have the server addons, and dont have out of game files like scripts

You don't. It runs on 1 core and you just don't load it down with a fuckload of addons.

I have a lot of problems on Fortnite (i have a gtx 980 and Intel I5)