The purpose of this study is to analyze the foreign policy outcomes of the Gulf Cooperation Council (GCC) to understand the extent to which a Regional Intergovernmental Organization (RGO) consisting of developing nations is able to promote regional cooperation. Much of the literature on integration and the formation of Intergovernmental Organizations was developed with regard to western nations. These approaches are examined for their contributions to foreign policy behavior analysis and with respect to understanding why small and developing nations join such organizations. Final analysis of the outcomes using two scales to measure the organization's ability to promote regional cooperation reveal that the level of success was moderate and the level of political action undertaken by the GCC was generally moderate to low. Leadership is supportive of the organization but both external and internal factors contribute to the modest levels achieved so far. Issues of national sovereignty and a decade of regional conflicts affected the ability of the organization to achieve greater levels or regional cooperation.