chris is constantly telling it is easy to port his gui to 68k, but for some reason doesnt do that himself.
I'm busy with other things, and don't use 68k any more, so I'm not interested in back-porting it. Clearly nobody else is interested either.
The biggest job is probably making it work on palette-mapped screenmodes. I am intending to tackle this myself (as it is useful for OS4 and might improve the speed on 16-bit modes, which are a bit sluggish atm), however it has very low priority.
If somebody else was tackling a 68k port and feeding code back into the OS4 version, I would be happy to help. But I am not, under any circumstances, going to undertake a 68k port myself.