KGPI is the ICAO code for Glacier Park International Airport (IATA FCA), located in Kalispell, MT.
Glacier International Airport (KGPI) sits in Kalispell, Montana, near Glacier National Park. The single 7,710 ft runway handles every current business jet. Field elevation 2,977 ft, with mountain-flying considerations. This is the same airport as KFCA — verifying canonical code on the way through.
Glacier Park International Airport is an airport in Flathead County, Montana, United States, six miles northeast of Kalispell. The airport is owned and operated by the Flathead Municipal Airport Authority, a public agency created by the county in 1974. The airport is near Glacier National Park.
Excerpted from Wikipedia, available under the Creative Commons Attribution-ShareAlike License.