Yes Harsha you can easily export Data from Gridview into Excel.
you can take the gridview data into a datatable and using this following dll
RKLibExportData.dll[
^] u can easily export Data from Gridview into Excel.
and the code that will help you is mentioned below
RKLib.ExportData.Export objExport = new RKLib.ExportData.Export("Win");
objExport.ExportDetails(dtEmployee, Export.ExportFormat.Excel, "D:\\"+filename+"_CollectionDetails.xls");