GRO or Gro may refer to:
Organisations General Register Office General Register Office (Northern Ireland) Technology and science Generic receive offload, in computer networking GRO structure file format, used by GROMACS
Transportation Girona–Costa Brava Airport (IATA code), Spain J. Douglas Galyon Depot (Station code), North Carolina, US Rota International Airport (FAA LID code), Northern Mariana Islands Other uses Green River Ordinance (band), an American rock band Gro (given name) Gró, a figure in Norse mythology Groma language (ISO 639-3 code) - language spoken by some Tibetans See also Compton Gamma Ray Observatory (CGRO)