Technically you can freeze gasoline, but only at temperatures of -40°F and -200°F. If you’re truly concerned about it freezing up during the winter, we’d suggest you either store it indoors or use an antifreeze additive.
-40°F and -200°F is a pretty wide margin, but it’s important to note that not all gasoline contains identical ingredients and components. But, if you end up with a can full of gasoline slushy this winter, we would not suggest using it once it melts back into a liquid form or gel-like substance as it can damage your engine.
Bottom line? If you live somewhere with extreme winter temperatures, it’s better to keep your gasoline somewhere less likely to freeze up and become harmful to your engine—but there aren’t many places where that’s likely to happen.