Hi,
Thanks for using Syncfusion products.
You can access the display text of the column using the property called HeaderText. Please refer the below code snippet which illustrates this:
Response.Write("Display Name:"+this.GridGroupingControl1.TableDescriptor.Columns[0].HeaderText);
Please refer the sample from the below link which illustrates the above:
http://websamples.syncfusion.com/samples/Grid.Web/5.2.0.25/F69820/main.htmPlease let me know if this helps you out.
Regards,
Raji