The document outlines a longitudinal research program, GAGE, focused on gender-based violence (GBV) against adolescents in the Global South, providing insights on how gender attitudes and norms change over time. It highlights findings from various countries, such as declining corporal punishment yet rising sexual violence among older adolescents, and the complexities of gender norms and practices like female genital mutilation/cutting. Key conclusions emphasize the importance of longitudinal methods for understanding violence trends, age differences, and the value of triangulating data with caregivers for a comprehensive understanding of adolescents' experiences.