Yes, there's a GCC port targeting the 68hc11. It's probably not in the
FSF tree yet, but was at ftp.netcom.com:pub/c/o/coactive last I looked
(Coactive Aesthetics makes 68hc11 development boards, with drivers and
rs422 and rs232 ports and such, and did their own port a few years
ago, and have since been keeping it up to date... it's pretty easy to
drop in their 2 or 3 additional files and build.)