GB may stand for:

• Gb (digraph)
• GB (supermarket) in Belgium
• GB Airways
• GB Glace, a Swedish ice cream company
• ABX Air (IATA airline code GB)
• Game Boy line
• Games behind, in sports scores
• Gigabit (Gb)
• Gigabyte (GB)
• Girls' Brigade
• Government and binding theory by Noam Chomsky
• Gravity bong
• Great Britain, or the United Kingdom (country code GB)
• Green Bank, West Virginia, telescope site
• GunBound
• Guobiao, Chinese National Standards
• Sarin nerve gas
• Giovanni Battista common Italian name
• University of Wisconsin-Green Bay

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