GBO explained

GBO may refer to:

• Greater Budweiser Open. Started in 1985. No Cooley has ever won.
• Game Boy Original, a Nintendo handheld game console
• Gbo language (ISO 639-3: agb), a Cross River language of Nigeria
• Get Britain Out, a British Eurosceptic organisation
• The Graham Bond Organisation, a British music group
• Green Bank Observatory, a radio astronomy observatory in Green Bank, West Virginia
• Northern Grebo language (ISO 639-3: gbo), a Kru language of Liberia
• Nationality code of British Overseas Citizen in the machine-readable passport