ICLEI provides technical guidance by participating in GCoM’s technical working groups, which address mitigation and adaptation in specific data-related sub-groups, including Emissions and Targets; Climate Action Planning; Resilience; and Access to Energy. ICLEI also participates in non-data related groups, including Access to Finance; Governance and Regional Coherence; Research; and Communications.

ICLEI has a representative in each group and sub-group, submits written comments and attends calls and in-person meetings. The goal is to unify and centralize how data are reported, using which channels, and how is it communicated to global stakeholders. ICLEI also provides data revision towards GCoM requirements for ICLEI Members and network of cities.