It would be very difficult to answer your question if firstly you do not provide the most important information ---> What faction is your character on? Alliance or Horde?

Alliance (GMT+8) Guilds

1) Black Rose - raiding
2) Jurisdiction - raiding (disbanded?)
3) Red Dot - casual raiding
4) Driven - raiding
5) Vis Vires - raiding
6) Reincarnation - raiding
7) Vestiges - raiding

among others. As for horde I think KAOS and Cross though I'm not really sure whether they're GMT+8 guilds. Look at the realm forums for guilds recruiting new members..

http://forums.worldofwarcraft.com/board.ht...mId=11146&sid=1

oops, didn't fully see the title of the thread

Anyway, those few guilds are ally