You can earn GWC "BADGE" by playing the mini game GWC 2011 once a day, just click the pouch thingy and you get your reward (badge,gc necklace and natal rings) THAT's it!
BTW, collect badges and you can craft GWC rings (Lv.40 and Lv.60)
I noticed some people gave wrong information about the GWC badge so i posted this.
GCPH PLAYAH!! \m/