This firmware GDC54C2Q supports PM9A3 with -00B7C subfix and stock FW version GDC51C2Q, GDC52C2Q, GDC53C2Q.
I'm not sure if it can support GDAxxC2Q drives! -> the 15TB version MZQL215THBLA-00A07 had a different firmware -> GDD5202Q.

MZQL2960HCJR-00B7C
MZQL21T9HCJR-00B7C
MZQL23T8HCLS-00B7C
MZQL27T6HBLA-00B7C
