Yes, the Panasonic Lumix G9 II is compatible with the ProGrade Digital V60 128GB SD.
ProGrade Digital V60 128GB SD is V60 class. Clears: MP4 4K30 LongGOP (72 Mbps, requires V10); MOV 4K/C4K LongGOP (200 Mbps, requires V30); MOV 4K/C4K ALL-Intra (400 Mbps, requires V60). Does not meet the floor for: MOV 4K/C4K ALL-Intra (top tier) (600 Mbps, requires V90).
Limitation
Does not meet Panasonic G9 II's 4K60 mode (requires Video Speed Class V90, 90 MB/s guaranteed floor) -- this card is V60 class (60 MB/s guaranteed). Works for 4K30 and all lower-bitrate SD-slot modes.
“Motion pictures with 600Mbps or less: External USB-SSD, SD memory card with Video Speed Class 90 -- Panasonic G9 II on-card 4K UHD 59.94p ceiling (600Mbps, the 800Mbps row is External-USB-SSD-only).”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)