Dave,
Thanks for the pointers. Actually, we were finally able to make this work. One important lesson learned, the pricing condition in GTS should be mapped in GTS in table /SAPSLL/TLCAGS - the screen is a bit misleading. When you see the screen, it appears as if we need to enter the feeder system condition type, but really needs to be GTS pricing condition.
Once we've tested this, I will make a post for those that might have issues with technique to pass pricing conditions from ECC to GTS.
Thanks,
Padma