Welcome. I made the jump from GT to GTP also. You're gonna have fun when the roads dry up!
Gas leak first. If its at the rear, I'd guess line damage from changing a rusty filter. Or seal damage from a fuel pump service. If at the front, a leaking fuel rail or hose could burn it down so find and fix that first. Injector O-rings leaking can also give a gas smell... and fire.
Yellow could be brake fluid or varmint pee lol.
Dex Cool is more orange, red is trans fluid or possibly steering.
Hopefully the wet S/C is just because somebody made a mess topping off the oil.
Mine had a K&N panel filter in it when I got it. I put slots in the airbox the let the whine sound out. Theres a how-to, ha ha.
Enjoy the ride and ask away, just remember to use the search feature to see whats already been said on a given subject.