The GPM Council consists of mayors of cities and their surrounding metropolitan regions or agglomerations.

Once a year the Council meets face-to-face at the annual GPM convention. Throughout the rest of the year, the Council meets on a virtual platform developed by the GPM. This platform enables decision-making, networking and exchange of practical solutions among member cities. Virtual meetings will also allow the GPM to present common, opt-in actions, which mayors can deliberate and decide on globally, and then implement locally.

The Council will consider proposals for debate and common action that originate from the mayors themselves, as well as from participating urban networks, citizens and civic bodies and from the private sector.