Intensification of gender norms during puberty affects adolescents’ perceptions and behavior related to violence. This study examined the association between gender norms and gender-based violence (GBV) among early adolescents considering socio-ecological variables using cross-sectional data from 3,618 Indonesian Global Early Adolescent Study pupils. Chi-square tests with simple and multiple logistic regression analyses examined how different factors' levels predict GBV. Among boys, GBV attitudes were found high (53%). Furthermore, they also had high heteronormative expectations, threatened feelings, experiences of violence, porn access, and 5+ adverse childhood experiences (ACEs). Logistic regression results revealed that adolescent boys having one or two scores of gender norms at the above-median are 1.3 times more likely to commit GBV and even 2.2 times higher if all were above median [AOR(CI) =1.3(1.1-1.6); 2.2(1.7-2.8)], respectively. Boys, having 5+ ACEs, and stronger endorsement on heteronormative relationships were also more likely to commit GBV [AOR(CI) =1.5(1.3-1.7); 1.5(1.2-1.9); 1.5 (1.3-1.7)], respectively. This research concluded that unequal gender norms intensified during puberty strongly correlate to attitudes towards GBV among early adolescents. Strengthening the individual aspects by providing a more conducive environment, such as comprehensive sexual education at school, is essential to prevent GBV.