According to this '05 Goat I located in NJ, the gas guzzler tax for the '05 is now $1300 (up from the $1000 on the '04)
http://www.pontiac.com/ws/nvlWindowSticker.pg?makeId=002&year=2005&modelId=0&postalCode=14228&pvc=0&mmc=2VX37&VIN=6G2VX12U15L355537&isbp=true&originatingBrand=DIVISIONAL
http://www.pontiac.com/ws/nvlWindowSticker.pg?makeId=002&year=2005&modelId=0&postalCode=14228&pvc=0&mmc=2VX37&VIN=6G2VX12U15L355537&isbp=true&originatingBrand=DIVISIONAL