The proposed methodology outlines a framework for the implementation of a user-customized service structure and a real-time, high-reliability correction data-provision system, leveraging advancements in central global navigation satellite systems (GNSSs). The proposed structure encompasses a variety of functions, including MountPoint-based user customization, protection level (P_L)-based reliability value provision, multisensor fusion, automatic fault response, and predictive resource allocation. The objective of its design is to satisfy the performance requirements of high-speed, high-precision application fields, including autonomous driving and urban air mobility. In this study, our primary objective is to minimize delays and ensure connection stability through high-frequency transmissions at frequencies greater than 1 Hz, the automatic separation of service paths, and the incorporation of restorable network redundancy design. We posit the hypothesis that GNSSs may evolve to encompass spatial-information-based services across various industries, thereby expanding beyond their traditional role in simple positioning infrastructure. Moreover, the implementation of institutional enhancements, such as certification standards, the delegation of operational authority, and the establishment of quality standards, in parallel with the proposed system, has the potential to serve as the foundation for substantial innovation in national GNSS services.