Naturally occurring gas hydrate accumulations are receiving considerable attention as a natural gas resource, as a geologic hazard, and as a component of the global carbon cycle. Fluid flow, lithology, permeability, heat flux, and gas source/migration play key roles in the emplacement of gas hydrates, but these factors remain insufficiently understood. In addition, there is ongoing innovation of geophysical methods used to identify and quantify gas hydrate occurrences, however, these approaches remain imperfect. Recent and ongoing geophysical surveys and drilling programs have provided a wealth of new knowledge on the saturation and distribution of gas hydrate in marine and permafrost settings, as well as the configuration and evolution of the associated gas and gas hydrate systems. For this session, we encourage contributions that provide insight into gas hydrate systems by presenting geological, geophysical, and geochemical characterization based on field programs as well as modelling and laboratory studies.