I haven't started my rx8 in about two years.
Does gas go bad? Do I need to drain it? I'm not sure how much is in there.
If I do need to drain it, what is the best way to do it? Can it be siphoned out, do I need to drop the gas tank, or there some other way to drain the tank? I'm in Florida, lots of humidity.

Thanks for the help!

 

Yes, gas can go bad. You should drain it and replace it with fresh fuel.
Use the fuel pump to pump it all out.
Search this forum for the service manual, it shows you how to run the fuel pump without starting the car.

Oh ... and welcome to the club.