How do i go about getting people on a gmod server?

I used to have a server back in the day that was running a NutScript schema I made. Because the genre of the schema was something I have never seen before on GMod(won't go in details because I might re-make it one day), I had no trouble filling up the slots. At first I told a few friends about it but people soon became curious and started joining, even managed to get a decent loyal playerbase in less than two weeks.