Display Screen or Portion Thereof with Graphical User Interface

This application is related to the following commonly owned co-pending patent applications; U.S. application Ser. No. 29/865,972, entitled “Display Screen or Portion Thereof With a Graphical User Interface,”; and U.S. application Ser. No. 29/865,975, entitled “Display Screen or Portion Thereof With a Graphical User Interface”.

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

FIG. 6 is a sixth embodiment thereof.

FIG. 7 is a seventh embodiment thereof; and,

FIG. 8 is an eighth embodiment thereof.

The dashed broken line perimeter in the drawings illustrate a display screen or portion thereof and forms no part of the claimed design. The remaining dashed broken lines in the drawing illustrates portions of the graphical user interface that form no part of the claimed design.