This paper explores South Korea’s evolving foreign policy under the Yoon Suk-yeol administration, highlighting its shift from a traditional middle power to a “Global Pivotal State” (GPS). The study examines the key drivers behind this transformation, particularly the enhanced U.S.-South Korea alliance, which has allowed South Korea to increase its regional and global influence. Through an analysis of the "Global Pivotal State" policy, the paper delves into how South Korea seeks to expand its leadership role in multilateral diplomacy, focusing on areas such as security, democracy, and climate change. Additionally, the study emphasizes South Korea’s efforts to strengthen bilateral relations, especially with the U.S., Japan, and Europe, while expanding its diplomatic reach to new regions such as the Indo-Pacific. By leveraging its strengths in green growth, technology, and official development assistance (ODA), South Korea aims to secure leadership in key global issues. Ultimately, the Yoon administration’s vision reflects South Korea's ambition to redefine its role in the international order, positioning itself as an influential actor in global governance.