Display Screen or Portion Thereof with Graphical User Interface

FIG. 1 is a front view 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 thereof; and,

FIG. 3 is a front view of a third embodiment thereof.

The outermost broken line in all views is an environmental feature illustrative of a computer display screen or portion thereof and forms no part of the claimed design. The remaining broken lines illustrate parts of the graphical user interface and form no part of the claimed design.