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 new design; and,

FIG. 2 is a front view of a second embodiment of a display screen or portion thereof with graphical user interface showing the new design.

The outermost broken lines in FIG. 2 showing an electronic device illustrate environmental subject matter and form no part of the claimed design. The dot-dash broken lines showing a display screen or portion thereof and the broken lines within, including all text elements, illustrate portions of the article and form no part of the claimed design.

The pair of curved broken lines illustrate symbolic breaks and form no part of the claimed design. The appearance of any portion of the article between the curved break lines forms no part of the claimed design.