GSP Group Correction Factors (GGCFs) are used to ensure that the total energy allocated to Suppliers in each Settlement Period in each GSP Group matches the energy entering the GSP Groups from the transmission system, adjoining GSP Groups and through embedded generation.

To achieve this, GGCFs are applied to the energy allocated to Suppliers from non half hourly metering systems.

Please visit the ELEXON Portal to get GGCFs data.