The implementation of enterprise architecture (EA) is no longer exclusive to large corporations; its principles have been adapted for various organizations, including small and medium-sized enterprises (SMEs) and industry-specific entities. Recognizing its potential, many governments have also adopted EA frameworks to address growing complexities in public sector operations. This adaptation, termed Government Enterprise Architecture (GEA), aims to enhance governance efficiency and digital transformation. However, GEA implementation remains a work in progress, with significant gaps in standardization and execution. For instance, Indonesia introduced GEA in 2018, but many implementers struggled with misinterpretations of the framework’s objectives and processes. To address these challenges, this study conducts a comprehensive global comparison of GEA methodologies. Using a Systematic Literature Review (SLR), the research examines key aspects of GEA, including its core principles, architectural domains, critical success factors, performance metrics, and potential benefits. By analyzing these dimensions, the study provides actionable insights for GEA developers—particularly in Indonesia, where the initiative is still nascent. A deeper understanding of global best practices can help refine Indonesia’s approach, ensuring effective implementation and maximizing GEA’s value in improving public sector governance.