Callsign GTI is Atlas Air
WHAT AIRLINE IS GTI?
GTI is the ICAO three-letter callsign prefix for Atlas Air. When a radio scanner, flight tracker or radar scope shows a flight like GTI123 or GTI45XY overhead, that's a Atlas Air aircraft talking to air traffic control.
Spot one yourself: open the live scope, enter your postcode, and tap any blip whose callsign starts with GTI for its type, registration, route and photo.