The gasoline doesn't freeze.
It's the water that might be in the gasoline that freezes and plugs fuel lines, carbs(if you have one), injectors, and fuel pickups. With circulating fuel systems(fuel injection) gas line freeze has not been a huge problem like it used to be back in the carberator days.
However, some geniuses at GM have a one-way fuel injection system that is showing up on many of GMs models. Back to gas line freeze again.
My 2¢