We claim the ornamental design for a display screen or portion thereof with graphical user interface, as shown and described.
FIG. 1 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a first embodiment;
FIG. 2 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a second embodiment;
FIG. 3 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a third embodiment; and,
FIG. 4 is a front view of a display screen or portion thereof with graphical user interface showing our new design according to a fourth embodiment.
The outer perimeter broken line depicting the display screen or portion thereof throughout the drawings forms no part of the claimed design. The remaining broken lines in the drawings illustrate portions of the graphical user interface which form no part of the claimed design.