I know zuulmusic has a paxton supercharger on his GT if you want to go that route but I'd really talk to Ed Morad (GTPED@msn.com) about getting the parts from him to do it or ordering the kit from ZZP. Look through the FAQ link if you want to know what it will take though.
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1998 Pontiac Grand Prix GT
WizAired CAI, Impala 12" Brake Upgrade, ZZP Alternator Rewire and Voltage Booster, Rotated Dogbone Mounts, Kicker KS690 6x9s, JBL GTO427 4s, JBL P652S 6.5s
2001 Ford F150 XLT SuperCab
Stock, LineX, 212K