Display Screen or Portion Thereof with Graphical User Interface

FIG. 1 is a front view of a first embodiment of a display screen or portion thereof with graphical user interface showing the claimed design;

FIG. 2 is a second embodiment thereof;

FIG. 3 is a third embodiment thereof; and,

FIG. 4 is a fourth embodiment thereof.

The outermost evenly spaced broken lines in the drawings show the electronic device, which is the environment of the design and forms no part of the claimed design. The dot-dash broken lines showing the display screen or portion thereof forms no part of the claimed design. The remaining broken lines showing portions of the graphical user interface form no part of the claimed design.