Just to add some working stats.
PAL Wii System 3.2 (never touched)
CIOS 249 (CIOS 38 Rev14)
Hermes 222 (37 & 36 Merged)
USB Loader GX r718 (latest DOL forwarded)
Run GH5 with 222 & 002 Fix on.
Game plays fine, although only tried one track, it's getting late lol.
Took a bit of fiddling...