GR
- GR – (s) Greece (FIPS 10-4 country code; ISO 3166 digram) – Hail (METAR Code)
- GRAS – (i) Generally recognized as safe (FDA list)
- GRB – (i) Gamma-Ray Burst
- GRC – (s) Greece (ISO 3166 trigram)
- GRD – (s) Grenada (ISO 3166 trigram)
- GRE
- (i) Graduate Record Examination
- (s) Greece (IOC and FIFA trigram, but not ISO 3166)
- grep – (a) Globally for Regular Expression, Print
- GRid – Global Release Identifier, a music industry identifier from the RIAA and IFPI
- GRID – (a) Gay-Related Immune Deficiency (original name of AIDS)
- GRL – (s) Greenland (ISO 3166 trigram)
- GRN
- (s) Grenada (IOC and FIFA trigram, but not ISO 3166)
- (i) Goods Received Note
- grn – (s) Guaraní language (ISO 639-2 code)
- GRP – (i) Graphite Reinforced Plastic
- GRU – (i) Glavnoje Razvedyvatel'noje Upravlenije/Главное Разведывательное Управление (Russian, "Main Intelligence Directorate" )
Read more about this topic: List Of Acronyms And Initialisms: G