The ornamental design for a displayscreen, or portion thereof, having graphical user interface, as shown and described.
FIG. 1 is a first embodiment of the display screen, or portion thereof, having graphical user interface; and,
FIG. 2 is a second embodiment of the display screen, or portion thereof, having graphical user interface.
The dashed line showing of the display screen and the remainder of the graphical user interface is included for the purpose of illustrating subject matter that forms no part of the claimed design.