GRR may refer to: Transport Agroar Carga Aérea, a defunct Portuguese airline Gadalar railway station, in Pakistan Georgetown Railroad, in Texas Gerald R. Ford International Airport, in Grand Rapids, Michigan Grand River Railway, in Ontario, Canada Vernon J. Ehlers Station, in Grand Rapids, Michigan Other uses Gainesville Roller Rebels, an American roller derby league Gate River Run, a running race in Jacksonville, Florida Gender Recognition Reform (Scotland) Bill Gradual release of responsibility Green Reefers, a Norwegian shipping company Gross reproduction rate Grothendieck–Riemann–Roch theorem Gurara language, a Berber language of Algeria with the ISO 639-3 code grr See also Grrr (disambiguation)