GPG

• Global public good, in economics, a public good available worldwide
• GNU Privacy Guard, cryptography software
• Goals against average (GAA), also known as goals per game, sports statistic
• Grains per gallon, water hardness measurement
• The Good Pub Guide, recommends pubs in the UK
• Generalized Petersen graph, a type of mathematical graph

Companies

• Guinness Peat Group, an investment holding company
• Grammophon-Philips Group, a previous name for record company PolyGram
• Greenwood Publishing Group, an educational and academic publisher in the USA
• Gas Powered Games, and their GPGNet online matchmaking service