GSDI Organisational Members included government agencies, academic and research institutions and departments, commercial firms and not-for-profit organisations and NGOs.

See the roster of the final GSDI Organisational Members in 2017, before closure.

GSDI Organisational Members had one official representative Delegate on the GSDI Council, which was the ultimate decision-making body of the Association. Each Organisational Member had one vote on matters that required a vote of Council. The eleven GSDI Board of Directors members were chosen from the Delegates of the Councl and served on the Board for a three-year period.