Since this is an adapted video mode like 4K Photo, it seems highly unlikely, and would probably run the mechanical or 1st curtain electronic shutter off the rails in short order IF they could operate at 30fps (which they apparently can't).
What I'm not clear on yet is the bit-depth using the elect. shutter in stills, 4K Photo, 6K Photo. I assume 10-bit, as GH3&4 were both 8-bit, and more contemporary Panny bodies have 10-bit. 12 would be awesome, though, and the GH5's powerhouse processor might be able to swing it!
