English abbreviations from gbr to gc
- GBR (United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram))
- GBRS (Ground-Based Radar System)
- GBR-T (Ground-Based Radar Terminal)
- GBS (Global Broadcast Service (pronounced: jibz—IPA: dʒɪbz))
- GBS/CGS (Ground-Based Sensor Common Ground Station)
- GBSCA (Greater Boston School Counselors Association)
- GBS disease (Group B Streptococcal disease)
- GBSF (Guillain- Barré Syndrome Foundation)
- GBSFI (Guillain- Barré Syndrome Foundation International)
- GBSI (Gannon Broadcasting Systems, Inc.)
- GBST (Georgia Basic Skills Test)
- GBT (Gravity Base Tank)
- GBU (Khashm El Girba Airport)
- GBU-8/B HOBOS (Glide Bomb Unit 8, Homing Bomb System)
- GBV (Gibb River Airport)
- GB viz. (Gall bladder visualization)
- GBWP (Gain-Bandwidth Product)
- GBY (God Bless You)
- GBZ (Claris Airfield (Great Barrier Island Airport))
- GC (Gonococcal, gonorrhea)