Hi Ariel,
Thanks for using Syncfusion products.
We have analyzed your query and you can use covered cells as stacked header in GridControl. We have prepared a sample as per your requirement and please find the sample from the attachment.
[Code Snippet C#]
this.syncgrid.Model.CoveredCells.Add(new Syncfusion.Windows.Controls.Cells.CoveredCellInfo(0, 0, 0, 6, true, true));
Please let us know if you have any queries.
Thanks,
Sankar
GridControl_43d8a691.zip