The GSDI Association has two categories of membership - GSDI Organisational Members and GSDI Individual Members.

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

Individual Members include professionals from the geo community and students at institutions of higher learning.

Membership fees for Organisational Members depend upon the type of organisation and where it is located in the world within the World Bank's ranking of economies, plus income for commercial firms. Individual Members have two fee categories - one for professionals and one for students. Individual Members from low and lower middle income countries (World Bank ranking) can join the Association for free on application.

GSDI Organisational Members have one official representative Delegate on the GSDI Council, which is the ultimate decision-making body of the Association. They can also name a Deputy Delegate to attend meetings when the official Delegate is unavailable. Each Organisational Member has one vote on matters that require a vote of Council. GSDI Board of Directors members are also chosen from the Delegates of the Councl.

GSDI Individual Members were formerly members of the International Geospatial Society (IGS) which was a separate wing of the GSDI Association, discontinued in 2015 as part of the 5-year GSDI Strategy and Action Plan 2015-2020, due to confusion that arose from some stakeholders, members and supporters concerning the role and legal status of IGS versus the Association.

GSDI Individual Members collectively have one vote on the GSDI Board of Directors via the 'Director, Individual Member Representative', who is elected for a three-year term from the ranks of all Individual Members in an election process governed by the GSDI Bylaws and Operating Procedures (2015) and overseen by the GSDI President.

 See the list of GSDI Founding Members from 2004 - Founding Members.