The Assembly is the governing body of the GEF in which representatives of all member countries participate. It meets every three to four years, and is responsible for reviewing and evaluating the GEF's general policies, the operation of the GEF, and its membership. The Assembly is also responsible for considering and approving proposed amendments to the GEF Instrument, the document that established the GEF and set the rules by which the GEF operates.
Ministers and high-level government delegations of all GEF member countries take part in the meetings. The Assembly combines plenary meetings and high-level panels, exhibits, side events and GEF project site visits. Prominent environmentalists, parliamentarians, business leaders, scientists, and NGO leaders discuss global environmental challenges within the context of sustainable development and other international development goals.