Previous cross-sectional studies show less traditional gender ideologies among East Germans after German reunification and even suggest slightly increasing East-West disparities. These findings challenge the assumptions of stable ideologies over the life-course as well as cohort replacement-based convergence over time. This study expands on previous research by analysing differences and trends in gender ideologies in the context of East and West Germany using data from the German Family Panel pairfam (2008-2018). It distinguishes between three cohorts born in the early 1970s, 1980s and 1990s who have different socialisation experiences before and after reunification. The results show smaller East-West differences in gender ideologies for the youngest cohort compared with larger gaps for the two older cohorts born before reunification. Convergence of ideologies is partly due to modernisation trends in West Germany and re-traditionalisation effects in East Germany across cohorts, but also due to attitudinal changes with age. Attitudes towards housework and female employment have particularly converged, while views on maternal employment and the consequences for children’s well-being continue to differ between East and West Germany. The findings underline the importance of persistent, long-lasting ideology differences due to the regime‐specific socialisation and composition resulting from the division of Germany, but also emphasizes the role of ideology change across cohorts and over the life-course for the overall converging trends in gender ideologies.