Display Screen 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. FIG. 1 is a front view of a display screen or portion thereof with graphical user interface according to a first embodiment of the claimed design; and, FIG. 2 is a front view of a display screen or portion thereof with graphical user interface according to a second embodiment of the claimed design. The outermost dash-dash broken lines in the drawings show a smartphone as environment and form no part of the claimed design. The remaining dash-dash broken lines in the drawings show portions of the graphical user interface and form no part of the claimed design. The dash-dot broken lines in the drawings showing the display screen or portion thereof and the bounds of the claimed design form no part of the claimed design. The grayscale shown in FIG. 1 represents a contrast in appearance.