2004-2006 cars were Australian Holdens. Somebody at GM thought it a good idea to stick GTO badges all over those cars. No wonder GM should have been allowed to go bankrupt and fade away into the sunset.
Don't get me wrong. The 2004-2006 Holdens are very nice cars. I'm just not a fan of manufacturers that resurrect badges and stick them on some random car, something GM seems to enjoy. I keep waiting for GM to import the Holden Ute and slap El Camino badges on it.
I had a '68 400, 4 speed convertible. After '72 the GTO, like most muscle cars, faded away. '73 was just plain ugly and by '74 little more than a Ventura/Nova with different badges.