gYm is Golf, Yamapi, and Mike

Golf and Mike are Thai Jrs, Yamapi has already debuted.
They were temporarily formed to promote volleyball with Kitty.

So far they only have one single:

Fever to Future released August 30, 2006
The single also comes with Yamapi's Houkago Blues and Golf & Mike's Run for Your Love (AWESOME song)

Find Yamapi info under News and Golf & Mike are under the jr. section.