You can use the GridStyleInfo.Trimming property to specify whether you want to see ellipses if the string will not fit in the cell. Maybe something like this for the whole grid (or you could do it on a cell or column r row basis).
this.gridDataBoundGrid1.TableStyle.Trimming = System.Drawing.StringTrimming.EllipsisCharacter;
There are a couple of ways to get the tip to show as well. One straight forward way is to use the PrepareViewStyleInfo event.
private void gridDataBoundGrid1_PrepareViewStyleInfo(object sender, Syncfusion.Windows.Forms.Grid.GridPrepareViewStyleInfoEventArgs e)
{
e.Style.CellTipText = e.Style.Text;
}
You may want to conditionally do this based on teh length of the text.