Information sharing (IS) is a key capability required for one-stop and networked government, responding to a variety of intra-organizational, inter-organizational, or cross-national needs like sharing service-related information between parties involved in the delivery of seamless services, sharing information on available resources to enable whole-of-government response to emergencies, etc. Despite its importance, the IS capability is not common for governments due to various technical, organizational, cultural, and other barriers which are generally difficult to address by individual agencies. However, developing such capabilities is a challenging task which requires government-wide coordination, explicit policies and strategies, and concrete implementation frameworks. At the same time, reconciling existing theoretical frameworks with the IS practice can be difficult due to the differences in conceptions and abstraction levels. In order to address such difficulties, this chapter proposes a conceptual framework to guide the development of Government Information Sharing (GIS) policies, strategies, and implementations. By integrating theoretical frameworks and the GIS practice, the framework adopts a holistic view on the GIS problem, highlights the main areas for policy intervention, and provides policy makers and government managers with conceptual clarity on the GIS problem.