No, the Panasonic LUMIX GH7 is not compatible with the ProGrade Digital CFexpress Type A 120GB.
Panasonic LUMIX GH7's Slot 1 is CFexpress Type B only. Panasonic's own spec sheet states 'Card slot 1: CFexpress Type B card' -- CFexpress Type A uses a physically different, smaller connector and cannot be inserted into this slot.
What works instead
See all compatible camera for the Panasonic LUMIX GH7 →“Card slot 1: CFexpress Type B card Card slot 2: SD memory card / SDHC memory card”
Last verified:
Compatibility inferred from spec rule (citations above are manufacturer-verified)