initialism of générateur automatique de programmes; RPG (programming language from IBM); abbreviation of glycéraldéhyde-3-phosphate; glyceraldehyde 3-phosphate (chemical compound)
Initialism of geometric dimensioning and tolerancing; initialism of Grand dictionnaire terminologique, a dictionary published by the Office québécois de la langue française (OQLF, the Quebec Board of the French Language)
acronym of Groupe d'experts intergouvernemental sur l'évolution du climat (“Intergovernmental Panel on Climate Change, IPCC”, literally “intergovernmental expert group on climate evolution”)