Hi Shek,
On further analysis we found that this can be achieved by customizing the GroupingExcelConvertorControl for exporting GridGroupingControl with summary in group caption to excel sheet. The covered range can be obtained from the QueryCoveredRange event handler for the caption elements (non - display elements).
Please refer the sample which implements the idea:
http://websamples.syncfusion.com/samples/Grid.Windows/F68234/main.htmKindly let us know if you need any further assistance.
Best Regards,
Jeba.