This synthesis report is an early, stand-alone SPR product and analytical tool that seeks to lay a foundation for common understanding of what is known about the current status of the GCF for all key stakeholders leading into the SPR. It provides a clear picture of what is already known for the SPR and serves as an update for the GCF Board on the SPR by synthesizing the key findings, conclusions, and lessons of the documents and evaluations available in the GCF-1 programming period.