Display Screen or Portion Thereof with Graphical User Interface

FIG. 1 is a first embodiment of a display screen or portion thereof with a graphical user interface showing our new design.

FIG. 2 is a second embodiment thereof.

FIG. 3 is a third embodiment thereof.

FIG. 4 is a fourth embodiment thereof.

FIG. 5 is a fifth embodiment thereof; and,

FIG. 6 is a sixth embodiment thereof.

The outer perimeter in broken lines that surrounds the graphical user interface in which the design is embodied represents a display screen or portion thereof and forms no part of the claimed design. Other broken lines within the graphical user interface illustrate aspects of the graphical user interface that form no part of the claimed design.