Originally Posted by idoke1
Open your garage and let in fresh air. It could be unburnt fuel that is still on your catalytic converter causing the smell or if worst case, a leaking fuel line.
He is right.
Keep in mind gas leaks if minor are hard to see because gasoline evaporates quicker than water. But if the leak was substancial then you better not drive the car.
Open the garage, then close after a few mins to let the fumes out. Then wait an hour and see if you are still smelling gas from the same source.
If you are still concerned and want to avoid the risk then have it towed to your local dealer or have a mechanic take a second look.