This study examines the relationship between Sovereign Environmental, Social, and Governance (SESG) initiatives and foreign direct investment (FDI) within the context of the Gulf Cooperation Council (GCC) countries from 2000 to 2022. The research explores how national ESG performance influences the attractiveness of these countries to foreign investors, with a particular focus on the moderating role of trade openness. Using a comprehensive panel data analysis, the study finds that strong SESG frameworks are positively correlated with higher FDI inflows, with trade openness amplifying the positive impact of SESG. Additionally, the use of Instrumental Variables (IV) estimation addresses endogeneity concerns, further confirming the robustness of the results. Moreover, the analysis reveals that trade openness amplifies the positive impact of SESG on FDI, suggesting that GCC countries with liberal trade policies and robust ESG practices are more successful in attracting sustainable and responsible investments. These findings contribute to the growing body of literature on ESG and FDI, offering valuable insights for policymakers seeking to enhance economic growth through strategic investments in sustainability and governance. The findings offer valuable insights for policymakers in aligning SESG frameworks with global ESG standards and leveraging global liquidity conditions to enhance FDI inflows, particularly in light of ongoing economic diversification efforts in the GCC.