Not as of current, well I should say not on disc. (to my knowledge.) Apparently using SD load the GC emulators are working, No one has verified using SD load to load a real GC game, although I think it's rather possible, However, the Wii will not boot Backup Disc's, in GCOS when you have the option to boot backup, as soon as you try to load the backup the wii will reboot. But that's not to say there will not be a new rev. of GCOS come out shortly that can fix the issue, but that is where it stands as of today.