Don't go through this path to discuss what someone should do with their property/assets. The gas station owner should do whatever he wants, donate the gas, raise prices or shutdown to keep all the gas to him. Is his right and none of us has nothing to do with it.
What would you do?
Not in my plans to own a gas station, so there is no point to have a personal opinion on this matter. I really believe that this decision should be taken by the owner and I don't have the right to judge him. As citizen, that should be impacted with a disaster, I always keep my car with a fair amount of fuel to reach a friend/family house's.