Several developers have volunteered to help out as soon as Gwydion is supported on their architecture. Porting Gwydion to a new species of Unix requires the new platform, an internet connection, and a few days work. Faster machines and network connections and a currently-supported platform handy nearby make the job easier but it's been done on isolated sub-100 MHz machines with a 56k modem.
Currently supported platforms are
The most popular and actively-supported ports are those to Linux and the BSD's (including MacOS X/Darwin). Unfortunately, several previously supported platforms have been neglected due to none of the current volunteers using them. If you're interested in one of these platforms the position of maintainer is open and it's probably not a big deal to update them to the latest and greatest:
Please announce your efforts on our gd-hackers mailing list, let us know of any problems you have (we may have seen them before). When you're done, let us know as well, so we can put your binary on the server.