Group isn't showing in creating a GA

Ah ok. Thank you for that Info.

Hey jatan,
I looked into the issue and I found the source of the problem. After I realized that this issue wasn't just exclusive to this site, but included other sites and the steam app itself I knew that it had something to do with steam in the past couple of weeks so I actually just looked at the steam update log and it seems that the problem is rooted from this update:
"Updated the web control to CEF version 41.0.2272.104
Improved CPU and memory usage in the web control"

This update was made on May 13th, 2015. It seems that this update to steam's web control is messing with steam API. This is a weird suggestion, but maybe if the site ran on an earlier version of CEF you might be able to recognize new groups. Seeing that web control has to do with managing steam's database, and the CPU/memory processing systems were modified in this update, this may be the source of your problem.

Hope this helps,
Aidan

P.S for your convenience I have included the link to the update log itself:
http://www.steampowered.com/platform/update_history/index.php

Yes, several times.
Jatain11t was right. Here's the answer from support:

"Hello, Swift.

This is an issue with SteamAPI not responding to Steamgifts group list requests. It must be fixed on Steam side, there's nothing we can do about it now, we're looking for a workaround."