To my knowledge, there should not be any particular JDM GS, maybe limited edition can consider though but I guess it might not be easy to find those~Just see what kind of GS you want, either a dressy one or the divers
I am still studying on GS model though, so I may not be right~
Anyway enclose the codes for your easy reference, quoted from watchuseek~
SBGA: Spring Drive w/ power reserve
SBGB: Spring Drive chrono
SBGC: Spring Drive chrono with GMT
SBGD: Manual wind Spring Drive 9R01A
SBGE: Spring Drive GMT
SBGH: Hi-Beat
SBGJ: Hi-Beat GMT
SBGM: Automatic GMT
SBGR: Automatic
SBGT: Quartz with day/date
SBGV: 9F82 Quartz (larger date wheel for bigger cases)
SBGW: Handwind 9S64
SBGX: Quartz - antimagnetic
They are missing a SBGF, which using 8J quartz movements