hmm, good point. Well, allow me to elaborate then.
When running nitrous, you have to run a set of colder plugs. You also need to determine if you want to run a dry or wet system. The kit you speak of is a dry kit as it injects only nitrous and relies on the stock fuel system for extra fuel. This is usually good for a 125 shot, although its optimal at 100. You will also want to get a fuel cutoff switch, bottle warmer, blow off valve, and solder/heat shrink ALL your electrical connections. A purge kit is nice but not necessary. As for the GTO, it can probably handle a 100 shot all day long, AS LONG AS you keep an eye on your plugs. It is a great experience but it can also be a costly one as the LS2 sells for @ $5000 should you pop your motor.
You sure you want the kit?
Have you seen the videos on my site of the Supra vs. Z06 ??? lemme tell ya, THAT video will make you want the kit IMMEDIATELY!!!