Hi Harshad,
Try this code snippet.
//expand the group record intially.
this.gridGroupingControl1.ChildGroupOptions.IsExpandedInitialValue = true;
//hide the "+/-" in a GroupCaptionPlusMinusCell
this.gridGroupingControl1.TableDescriptor.Appearance.GroupCaptionPlusMinusCell.CellType = "Static";
Please try the attached sample and let me know if you are looking something different.
GRoupingColors.zipBest Regards,
Haneef