Thoughts on garry's mod?

I don't really think that it's underrated. I mean it is an amazing game and so many people loves it. People do mods for it every single day. It is famous since it came out. I ask every random gamer and they say Gmod is a good wholesome game. Yeah it's really old but it's still awesome. I showed to my girlfriend and even she liked it. :D It has almost 600.000 reviews on steam and 96% positive. Usually a good game gets like 30.000 and 80%... and I love it soo much.