I think you can find a stock 05 tune on the HP Tuners site. Anyone with HP Tuners software can load the tune for you. That requires credits to license the PCM.
04 Pontiac GTO
400+ RWHP / 400+ RWTQ of Magnacharged goodness --- Flowmaster cat-back exhaust
Pedders Track II with Hotchkis swaybars --- 06 GTO brakes with stainless lines and Hawk pads
10-speaker, 1200-watt custom sound system
98 Pontiac Grand Prix GTP