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;
FIG. 2 is an enlarged view of the area bounded by dot-dash broken lines in FIG. 1; and,
FIG. 3 is an enlarged view of the area bounded by dot-dash broken lines in FIG. 1, but showing an alternate embodiment.
The even broken lines illustrate the display screen or portion thereof, and form no part of the claimed design. The dot-dash lines in the figures illustrate a boundary of the claimed design, and form no part of the claimed design.