It really should be fine as long as it isn't synthetic. Most Power Steering fluids are petroleum based so they are a basic derivative of gas. Just drive it and enjoy the cool smoke that it will make. It'll probably get you some babes.
your gas tank
NOTHING
What will happen if water gets inside gas tank
If the volume of the tank was effectivelly constant, and the tank was sealed to prevent gas escaping, the pressure of the gas would increase.
It depends on what kind of fuel is supposed to be in the tank.
It is very difficult to overfill a gas tank. Most gas pumps can sense when a tank is getting full, and the supply of gas automatically stops.
bad things
It will Probably EXPLODE!!
The float is located inside the gas tank. It moves up and down with the fluid level to signal your gas gauge how much fuel is left in the tank.
nothing would happen in this case
No.Because it could ruin your motor.
Your screwed depending how much you got in there.