This is confirmed via Reddit

venister
Valve only knows it. ;) BTW currently we ranked 15th and we hope that we can have greenlit in near future.

Im currently working on a post for the whole reddit AMA. It can be found here
http://steamcommunity.com/groups/GunZ2/discussions/0/828939797178096226/

If you have a question for them please head over to Reddit and ask!
http://www.reddit.com/r/Gunz2/comments/1ew6fb/ama_with_gunz_2_developers/