Hi all,
I managed to get Nils M. Holm's PS/Tk running on Gambit.
I had to account for a subtle R5RS incompatibility in Gambit, which is that colon-terminated identifiers are keywords -- a set disjoint from the set of symbols. PS/Tk uses such identifiers to indicate options passed to wish for the creation of widgets.
That said, it's an interesting hack, and it works well once this discrepancy has been addressed. Now we can enjoy a quick and easy way to get a GUI for our Gambit applications!
The complete source file is at:
http://ii-0-ii.com/parodycheck/software/tk-gambit.scm
--Jeff