GDI

• Gasoline direct injection, a type of fuel injection
• Graphics Device Interface, a component of Microsoft Windows
• Guanosine nucleotide dissociation inhibitor, a protein

• Gabriel Dumont Institute, in Saskatchewan, Canada
• Gardner Denver, an American manufacturing company
• Gay Doctors Ireland, a professional organisation
• GDI Integrated Facility Services, a Canadian janitorial service
• Geena Davis Institute on Gender in Media, an American nonprofit
• Girl Develop It, an American educational charity
• Global Disinformation Index, a UK think tank
• Gottlieb Duttweiler Institute, a Swiss think-tank
• Gulf Drilling International, a Qatari oil and gas company
• General Directorate of Intelligence, the intelligence agency and secret police of the Islamic Emirate of Afghanistan (Taliban)

• Baka language (ISO 639-3 code)
• Gender Development Index, an index of gender equality
• Gordil Airport (IATA code), in the Central African Republic
• Gross domestic income, the total income within a state
• Los Guerreros del Infierno, a Mexican professional wrestling stable

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