The GGP is a cross-national research infrastructure that was established in 2001and which aims at understanding how the lives of individuals evolve over thewhole life course, from young adulthood to older ages (more information canbe found on our website: www.ggp-i.org). It furthermore aims at understanding the ways in which various factors, such as public policy, affect family lifeincluding the relationships between generations and between genders. It is aresearch infrastructure built on the principle of open access. It provides comparable micro-level data from 19 countries as well as related contextual data. In this paper, we first provide an overview of the GGP including its key features (i.e. what is the GGP?) and its capabilities (i.e....