Know you've already purchased a set, but figured I'd chime in...
The Camaro ZL1 rotors are the new two-piece aluminum-hat and iron disc piece, but they're made for the same calipers. So they'll work on our car with the 6-piston calipers. It's the same rotor that is sold now on new-from-the-lot CTS-V's.
I guess the old one piece, bimetal co-cast rotor - aluminum hat cast into the iron rotor - was retired. I still run an old set, however, and they're fine.
Rotors from a Corvette can work... with modification, I believe. The bolt pattern is slightly different. But it'd also need to be the carbon ceramic rotors from the ZR1 or Z06 with Z07 package, and then I couldn't tell you how the calipers and pads differed.
The Corvette Z06 otherwise uses PBR calipers as standard fitment, not Brembos. The rotor size isn't right for the CTS-V 6-piston calipers you'd be trying to use them with.