ATS spindles and ABS questions

[tlillard23]

I have ATS spindles and GTO ls2 with all the harnesses. Trying to find out what kind of sensors I should get on the rear end that will match the ATS (corvette) spindles to go along with my 2005 GTO ECM/BCM.... Not sure if I will actually get ABS worrking, just want to order my rearend with the highest chance of it working.
Does the 2005 GTO have a 3 or 4 channel ABS system?
Does the GTO have the same reluctor as the ATS spindles\?