Gasoline Assurance and Security Act - Instructs the Secretary of Energy to request the National Academy of Sciences to study and report to Congress on : (1) what federal action would be necessary to improve the reserve supply of gasoline in situations of severe gasoline supply interruption; (2) the configuration and feasibility of a federal strategic national reserve for gasoline, taking certain factors into account; and (3) the physical storage options available, on a scale appropriate for a national reserve for gasoline, jet fuel, diesel fuel, and natural gas, compared with the storage options for crude oil in the Strategic Petroleum Reserve.