This session invites contributions focused on the theory, development, and application of gravity field models and geodetic reference frames. Potential topics include the realization and refinement of global and regional terrestrial reference frames (e.g., ITRF, IHRF, NATRF, NAPGD/CGVD), advances in gravity field modeling using terrestrial, airborne, and satellite data, and the integration of novel technologies such as quantum gravimetry and MEMS-based sensors. We encourage submissions addressing static and time-variable gravity field determination, geoid modeling, and reference frame stability, accuracy, and monitoring. This session aims to foster interdisciplinary dialogue and showcase the role of gravity and reference systems in supporting geospatial infrastructure, scientific research, and societal needs.