Grand Isle Seaplane Base
Grand Isle Seaplane Base is a private-use seaplane base located three nautical miles northeast of the central business district of Grand [Isle, Louisiana|Grand Isle], in Jefferson Parish, Louisiana, United States. It is owned by the Freeport Sulphur Company.
Although most U.S. airports use the same three-letter location identifier for the FAA and IATA, Grand Isle Seaplane Base is assigned GNI by the FAA but has no designation from the IATA.