GBO may refer to:
GBO - 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
