GB or Gb may refer to:
Gbcast (also known as group broadcast) is a reliable multicast protocol that provides ordered, fault-tolerant (all-or-none) message delivery in a group of receivers within a network of machines that experience crash failure.
GB 18030 is a Chinese government standard, described as Information technology — Chinese coded character set and defines the required language and character support necessary for software in China.
Gbenga Akinnagbe /ˈbɛŋɡə əˈkiːnəbeɪ/ BENG-gə ə-KEEN-ə-bay (born December 12, 1978) is an American actor and writer, best known for his role as Chris Partlow on the HBO series The Wire.
"GBI (German Bold Italic)" is a song by Japanese American music producer Towa Tei, featuring vocals from Australian singer Kylie Minogue, Japanese musician Haruomi Hosono, and co-written by Tei and Minogue.
The GBU-28 is a 5,000-pound (2,268 kg) laser-guided "bunker busting" bomb produced originally by the Watervliet Arsenal, Watervliet, New York.