And as wanky as the G1000 is it doesn't have the fail passive systems for CAT II or never mind the fail safe for CAT III a or b.
I thought that you were referring to "You should not fly an ILS to minimums as a private flyer"
I know that the G1000 is not approved for II, III, IIIc ops, but I reckon in an emergency where you have no other option you could do a zero/zero landing with synthetic vision and walk away.