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