The Generations and Gender Programme (GGP) is a research infrastructure that generates harmonised, high-quality, and timely data on families and individual life-course trajectories. Its flagship instrument—the Generations and Gender Survey (GGS)—provides comparable evidence on demographic behaviour, intergenerational relationships, and the evolving social roles of women and men, thereby enabling scholars and policy-makers to address pressing societal challenges. Currently, a second round of comparative data collection is ongoing and will deliver fresh insights into persistent low fertility, the increasingly complex transition to adulthood, and new forms of family solidarity. In Italy, Wave 1 of the second round started in summer 2025, supported by the PNRR projects “Fostering Open Science in Social Science Research” (FOSSR) and “Aging Well in an Aging Society” (Age-It).