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 first embodiment of a display screen or portion thereof with graphical user interface showing our new design;
FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with graphical user interface showing our new design;
FIG. 3 is a front view of a third embodiment of a display screen or portion thereof with graphical user interface showing our new design; and,
FIG. 4 is a front view of a fourth embodiment of a display screen or portion thereof with graphical user interface showing our new design.
The outer broken lines showing the display screen or portion thereof form no part of the claimed design. The remaining broken lines in the figures depict portions of the graphical user interface that form no part of the claimed design.