This study delves into the convergence of Green GDP among 160 nations from 1970 to 2019, emphasizing the pivotal role of environmental policies in shaping sustainable economic outcomes. By comparing traditional and Green GDP, which accounts for environmental degradation, this paper identifies distinct economic clusters or “convergence clubs” and reveals how policy-driven changes influence these classifications. The findings highlight the significant impact of environmental policies on economic convergence and propose actionable policy recommendations to foster sustainable growth, making this study essential for policymakers engaged in economic and environmental planning. This study demonstrates the long-term convergence of the examined nations' economic growth processes, influenced by their varying commitments to sustainable practices and regulatory frameworks that govern environmental protection. Thus, regardless of the variations across nations and their environmental policies, various economic strategies tend to produce similar outcomes in the long term.