It's been a while since the last update!
GNAT AUX has been upgraded to the 25 March 2011 release of gcc 4.6.0. In addition, the C++ language has been added to the port/package, and it builds by default.
The FreeBSD port of GNAT AUX was published today. The pkgsrc version that serves NetBSD and DragonFlyBSD will probably be published within a week. There were a lot of fixes added to the NetBSD version as well.
The next version published will probably coincide with the future release of gcc 4.6.1.