Hi Julien,
Thank you for your interest in syncfusion products.
You can handle this operation through ‘QueryImportExportCellInfo’ event along with the following code and also set the ConverterOptions to ‘ColumnHeaders’.
//In buttonAdv1_Click.
gec.GridToExcel(this.gridControl1.Model, workBook.Worksheets[0],ConverterOptions.ColumnHeaders );
Please refer to the following sample which illustrates the same.
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=GCExportWithHeader1984405269.zipLet me know if you have any other concerns.
Regards,
Ragamathullah B.