GUD
GUD stands for:
- Combined gas and steam power plant
 - Gerhard Mercator University Duisburg
 - Groupe Union Défense , right-wing extremist student organization in France
 - Aéroport de Goundam (IATA code), Goundam Airport, Timbuktu Region, Mali
 - Guadeloupe (UNDP code)
 
gud stands for:
- Dida (language) (ISO-639-3 code), also Yocoboué Dida, language spoken in Ivory Coast