Ok, so maybe I'm late, but it's not very widespread it seems, perhaps because it's commercial. My site is
http://www.mikhailtech.com and right now I'm using a custom script with mod_rewrite to parse articles from a particular forum and display them in multi-page format. It works but I'd like something a bit more integrate and am wondering if GARS is it. I know people use some sort of article systems here, just wanted some feedback.