I need to trace out the signal paths as well, and would rather re-verify dumps of the PALs (they're not ROMs) if there are already any in existence.
Let me know when you find it 
opssss...forgive me..you were talking about pal and gal, not roms...
Yes, for them you need to handle the board phisically .
And no, I'm not in the US, I'm in europe, (high delivery price and maybe duty too)
so better you find out someone else closer to you.
Anyway, I'm so curious about your project...what's the final goal?
To really clone the GG2
Greets