Yes, the Panasonic LUMIX GH7 is compatible with the ProGrade Digital CFexpress Type B Gold 128GB.
Panasonic LUMIX GH7's Slot 1 accepts CFexpress Type B cards directly. ProGrade Digital CFexpress Type B Gold 128GB has no published VPG rating in the DB, but Panasonic's own spec never requires a specific VPG rating on GH7's CFexpress slot for any recording mode -- from the lowest 72Mbps tier up through above 600Mbps -- including variable frame rate with ALL-Intra and internal ProRes/ProRes RAW recording -- Panasonic's own spec states these require a CFexpress card; no SD card of any class can record them. there is nothing to verify: any CFexpress Type B card that physically fits meets every mode per the manufacturer's own published requirement.
“Motion pictures with 72Mbps or less: CFexpress card, SD memory card with SD Speed Class with Class 10 or Video Speed Class 10 or higher Motion pictures with 200Mbps or less: CFexpress card, SD memory card with UHS-I / UHS-II UHS Speed Class 3 (U3) or Video Speed Class 30 or higher Motion pictures with 400Mbps or less: CFexpress card, SD memory card with Video Speed Class 60 or higher Motion pictures with 600Mbps or less: CFexpress card, SD memory card with Video Speed Class 90 Motion pictures with 800Mbps or more, variable frame rate with ALL-Intra, or ProRes: CFexpress card”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)