I was thinking of joining one of the low mod club racing with a gxp (or gt depending if the gt would put me in a lower class). Does anyone know what the mandatory safety requirements for the car is if I do this?

Something like: http://www.moutons.org/sccasolo/index.shtml
Stock

As a rough guide, if your car has modifications beyond this list it is not eligible for Stock Category:
Anything available on the exact model and year of your car as standard or optional equipment, as installed on the factory assembly line (nothing available only dealer-installed is allowed), plus
Standard OEM identical replacement parts
Accessories, gauges, appearance, comfort, and convenience items (not replacement driver's seat, though) that basically don't help
Added roll bar or roll cage to spec (not required, though)
Driver harness (no cutting seats to install, though)
Trailer hitch and/or tow bar mountings
Any wheel of diameter and width identical to a stock or factory optional wheel, offset within +- 0.25 inch
Most street legal tires that will fit the mounted wheels and stock bodywork
Any shock absorber of the same type and mounting as original; no change to standard spring mountings is allowed; suspension geometry may not be altered; gas or hydraulic shocks are permitted
Any brake linings; pre-1992 cars may use solid/braided metal brake lines.
Any front anti-roll bar (no change to stock/optional rear anti-roll bar, if present)
Manufacturer specified ignition settings only
Any replacement air filter element (or removal of air filter element); no plumbing changes, however
Engine bored no more than .020"; no balancing or porting/polishing of head
Replacement of any part of the exhaust system past the catalytic converter (if quiet)
Any oil filter
Added clutch scattershieldUnless I really fall in love with it I don't want to start ripping out my A/C on my primary driving car. (I can afford two just don't want to if it's gonna be a huge waste of money).

Thanks!
Ray

Why would you have to do anything, other than personal safety equipment? Those are things that will knock it OUT of the stock class. Race it as is, it's a better car than we are drivers!

Yeah, Rasperin, I'd leave the car alone. No need to tear it apart. The G8 is a good car. Baabootoo made a good point...it's a better car than we are drivers!

Good luck...

Your current auto policy will not cover any damage sustained during competition, keep that in mind when you venture onto the track first time. I have a friend who took his brand-new BMW to The Glen first month he had it, came home with thousands in non-reimbursable damage. And, additionally, GM will frown upon warranty submissions for anything that breaks on the track.

There is track day insurance available from most agencies. It's a couple hundred dollars a year with a limited number of days, but well worth it for the piece of the mind.