Gmod adventure maps?

one of my favorite things to do in minecraft was to download peoples adevnture maps they created and play them. Is there anything similar to that in gmod? all ive found so far is http://www.facepunch.com/showthread.php?t=1111618

yes theyre called custom campaigns

No, and I’m thankful for that.

I feel like this is what you are really looking for…