I'd be delighted to see gm2 in the gcc repository. The gm2 repository
is currently in git format (changed from cvs 2 weeks ago). All fsf
copyright assignment forms have been done some years ago.
At present the gm2 master can be grafted onto gcc-4.7.3 with 10 patches
applied. Under Debian Wheezy x86_64 the regression tests show 332
failures and 8298 passes.
From reading http://gnu.gcc.org/wiki/SvnBranch I wonder whether it would
seem sensible to create two branches one at 4.7.3 and another at branch
at the head (maybe) and mercilessly merge from the head. Maybe one
of the earlier activities should be to forward port the 10 patches and
post them to the appropriate mailing list?