to macegr:
Are you sure on that one? I have a RS232 converter myself, and judging by the size of the RS232 conversion chip itself, I don't think this functionality can possibly be embedded on the Basic Stamp. Also, on my Basic Stamp development board, there's a separate RS232-conversion chip right behind the 9-pin RS232-port. This would be redundant if the BS could do the conversion itself.
Will be up and looking for my original GPS cable in just a minute 