A zgcc squashfs has been uploaded on http://externe.net/zaurus/guylhem-rom/zgcc
It has been tested with guylhem-distro and runs fine. On the last version, you simply have to do su root ; mount /opt/devel
You can use it with the current version if you run a shell script. Simply create /opt/devel and use the shell script with bash -rcfile.
The next version will feature additional tools (perl utils for ex.). Enjoy.