White Gas is a common name for two flammable substances. In its most common modern usage, it is used as a generic name for camp stove and lantern fuel, usually Naphtha.¹

White Gasoline, also called White Gas can also be a name for pure gasoline, without additives. This was commonly used when leaded gas was normal, to prevent fouling in situations where the properties of the tetraethyl lead additive were not required.²

References

1. ^ http://www.welcomehome.org/backcountry/fuel.names.txt
2. ^ http://www.texaspowerwagon.com/gasoline.htm