Display Panel or Portion Thereof with Graphical User Interface

The patent or application file contains at least one drawing executed in color. Copies of this patent or patent application publication with color drawing(s) will be provided by the Office upon request and payment of the necessary fee. The sole FIGURE is a front elevation view of a display panel or portion thereof with graphical user interface, showing my new design. The dashed and dot-dashed broken lines in the drawing show portions of the display panel or portion thereof with graphical user interface that form no part of the claimed design.