This chapter aims to provide a comprehensive understanding of platform government research, offering insights for digital government scholars and practitioners to advance research and practice in the field. To achieve these goals, this chapter explores the concept of “Government as a Platform” (GaaP), contrasting it with traditional e-government models. Through a systematic literature review platform government research, this chapter explores how digital government scholars approach GaaP compared to traditional e-government, the roles of government in platform ecosystems, dominant research methods, and geographical contexts. Findings reveal that GaaP is the dominant model of platform government in recent research, with governments primarily acting as platform catalysts and arbitrators. Quantitative methods prevail, though GaaP studies show greater methodological diversity. Research is concentrated in developed countries, with limited representation from the Global South. This chapter concludes by identifying future research directions, including ethical considerations, decentralized governance models, sustainability of GaaP initiatives, and the need for more inclusive studies in underrepresented regions, offering insights for scholars and policymakers in advancing digital government research.