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.
The GBU-39/B Small Diameter Bomb (SDB) is a 250 lb (110 kg) precision-guided glide bomb that is intended to provide aircraft with the ability to carry a higher number of more accurate bombs.
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 BENG-gə ə-KEEN-ə-bay (born December 12, 1978) is an American actor and writer, best known for his roles as Chris Partlow on the HBO series The Wire and as Larry Brown on the HBO series The Deuce.
Omogbolahan Gregory "Gboly" Ariyibi (born January 18, 1995) is an American professional soccer player who plays as a midfielder for Motherwell on loan from Championship club Nottingham Forest.
GB/T 2312-1980 is a key official character set of the People's Republic of China, used for simplified Chinese characters.