If you spill gasoline on your car, the first thing you should do is to clean it off as soon as possible. Gasoline is a very flammable liquid and if it's left on your car for too long, it could potentially catch fire.
To clean gasoline off of your car, you'll need to use a degreaser or something similar. Make sure to read the labels carefully and follow the instructions, as some degreasers can be corrosive. Once you've applied the degreaser, rinse it off with plenty of water. You may need to repeat this process a few times to get all of the gasoline off of your car.
Once you've cleaned your car, be sure to wash your hands thoroughly with soap and water. Gasoline can be dangerous if ingested, so it's important to make sure that none gets on your skin or in your mouth.