Our GMOD server has proven to be popular with the players, so thanks for the community and thanks for the interest in keeping it up!
Unfortunately, someone is abusing the server.
I was notified that our server was being used maliciously again so for the time being, I have shut it down as our service could be terminated. I will attempt to lock it down as I didn't put much effort into doing this the first time this happened. As I do not want to put our server in jeopardy, I will try to focus on security for the next couple of days, and will repost when the server comes back online.
TLTR : it'll be back up soon