Ok people, here's an update. After scouring ebay and past posts, I have ascertained that there is in fact a specific caliper needed for this job.
Needs to be:
59100-20C02 front caliper assy right hand
59300-20C02 " " " " " " left hand.
These are numbers i was able to dig up from various fiche parts from suzuki. If anyone is capable of verifying, i'd like to know.
Anyway, looks like you need the left hand caliper and then rotate it 180 and put it on the GS with the bracket.
The particular caliper was made for 1993 - 1995 gsxr's and looks like this