Display Screen or Portion Thereof with Graphical User Interface

FIG. 1 is a first image of a display screen or portion thereof with a transitional graphical user interface showing my new design.

FIG. 2 is a second image in a sequence thereof.

FIG. 3 is a third image in a sequence thereof.

FIG. 4 is a fourth image in a sequence thereof.

FIG. 5 is a fifth image in a sequence thereof.

FIG. 6 is a sixth image in a sequence thereof.

FIG. 7 is a seventh image in a sequence thereof.

FIG. 8 is an eighth image in a sequence thereof; and,

FIG. 9 is a ninth image in a sequence thereof.

The exterior even-length broken lines illustrate portions of the display screen and form no part of the claimed design. The remaining even-length broken lines illustrate portions of the graphical user interface and form no part of the claimed design. The appearance of the transitional graphical user interface sequentially transitions between the images shown in FIGS. 1 - 9 . The process or period in which one image transitions to another image forms no part of the claimed design.