Geo- is a prefix derived from the Greek word γη or γαια, meaning "earth", usually in the sense of "ground or land”.
GEO or Geo may also refer to:
Arts, entertainment, and media
GEO (magazine), a popular scientific magazine
Geo (Ninjago), character from Ninjago
Geo Stelar, the protagonist in Mega Man Star Force
Geo TV, a pay television channel in Pakistan
Brands and enterprises
Geo (automobile), a defunct brand of entry-level cars produced by General Motors
Georgetown University, abbreviated as Geo. in Bluebook
GEO Group, a prison corporation
Computing and science
Geo (microformat), a microformat for marking up geographical coordinates in (X)HTML
Generative engine optimization, the marketing practice of influencing the results provided by large language models
Gene Expression Omnibus, or GEO, a National Center for Biotechnology Information database for gene expression
GEO 600, a detector for gravitational radiation
Geo URI, an IETF proposed standard for making URIs for physical locations
Geosynchronous Equatorial Orbit, an orbit used for satellites that remain at a fixed position above the ground
Groups and organizations
General Education Officer, the basic rank of teachers of the Ministry of Education in Singapore
Group on Earth Observations, an intergovernmental organization
Grupo Especial de Operaciones, a special SWAT division of the Spanish police
People
Geo Bogza, Romanian poet and essayist
Geo Dumitrescu, Romanian poet
Geo Rutherford, American artist and TikToker
George (given name), commonly abbreviated Geo.
Christian Geo Heltboe, Danish comedian known by his middle name
Places
Geo (landscape), a creek (inlet) or gulley in the Orkney and Shetland Islands
GEO, the IOC country code and three letter country code for Georgia (country), in Eurasia
GEO, the IATA code for Cheddi Jagan International Airport
Estadio Casas GEO, stadium in Mexicali, Mexico