GU
- gu – (s) Gujarati language (ISO 639-1 code)
- GU – (s) Guam (postal symbol; ISO 3166 digram)
- GUA – (s) Guatemala (IOC and FIFA trigram, but not ISO 3166)
- GUF – (s) French Guiana (ISO 3166 trigram)
- GUI – (a) Graphical user interface ("goo-ey")
- GUILT – (a) Gangliated Utrophin Immuno Latency Toxin
- guj – (s) Gujarati language (ISO 639-2 code)
- GULCR – (i) Grupo de Usuarios de Linux de Costa Rica
- Gulag – (p) Glavnoye Upravleniye ispravitelno-trudovykh LAGerei i kolonii (Russian Главное Управление Исправительно—Трудовых Лагерей и колоний, "Main Directorate of Corrective Labour Camps")
- GUM
- (a) Glavnyi Universalnyi Magazin (Russian Главный Универсальный Магазин, "Main Department Store"; known in Soviet times as Gosudarstvennyi Universalnyi Magazin/Государственный Универсальный Магазин, "State Department Store")
- (s) Guam (ISO 3166 trigram)
- GUT – (a) Grand Unification Theory
Read more about this topic: List Of Acronyms And Initialisms: G