If you do a more thorough search you can fix the offset problem with bigger studs and minor mods to the rotor. ALOT of guys on ls2gto.com and the other GTO sites run them and have been for awhile now. So it shouldn’t be a problem. Just do a search…
EDIT: The offset difference is .65 as one is 120mm the other is 120.65 hence the mods you need to do to the rotor.