There is no multistate button object in GT displays.
Do not make a mistake, however, when comparing them to PanelView.
GT displays are overall much more powerful and versatile product.
What are you trying to achieve?
It may be possible to be done in alternative way.
One warning about all GT displays: debur well the mounting cutout edges and do not overtighten the mounting screws.
Otherwise, the installed unit screen surface may deform, and the touchscreen may unstick from the unit body.
On the other hand, lightly tightened screws tend to self-loosen, and it's a good idea to put them on blue locktite from the very beginning.