GB
- GB – (s) Gabon (FIPS 10-4 country code) – United Kingdom of Great Britain and Northern Ireland (ISO 3166 digram)
- GBBC – (i) Great Backyard Bird Count
- GBE – (i) Knight/Dame Grand Cross of the Order of the British Empire
- GBH – (i) Grievous Bodily Harm
- GBP – (s) United Kingdom pound sterling (ISO 4217 currency code)
- GBR – (s) United Kingdom of Great Britain and Northern Ireland (ISO 3166 trigram)
- GBU – (i) Glide-Bomb Unit – Global Business Unit(s)
Read more about this topic: List Of Acronyms And Initialisms: G