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 an embodiment of our new design; FIG. 2 is a front view of a display screen or portion thereof with graphical user interface showing another embodiment of our new design; and, FIG. 3 is a front view of a display screen or portion thereof with graphical user interface showing another embodiment of our new design. The outermost broken line in each of FIGS. 1 - 3 depicts a boundary line of a display screen or portion thereof and forms no part of the claimed design. No color is claimed. The remainder of the broken lines in FIGS. 1 - 3 depict text, graph grid lines, icons, or the remainder of the graphical user interface or portion thereof and form no part of the claimed design.