This research paper offers a comprehensive comparative analysis of Gross Domestic Product (GDP) structures across a diverse set of countries, including the United States, Germany, Russia, China, and India. The study examines the composition of GDP in both developed and developing economies, focusing on key sectors such as industry, services, and agriculture. The investigation employs statistical methods to identify significant differences and similarities in economic structures, highlighting the factors shaping economic growth and development. The findings contribute to a deeper understanding of global economic dynamics.