Currently, only the listbox GUI element have the highlighted background and highlighted text color properties, along with a border color option. Labels on the other hand does not. It would be nice if all GUI elements that use text could have these properties in them.
In addition, the only GUI element that can align text to all possible edges of its bounderies is buttons. Others can only align to either left, center or right.
Labels are not conceived as an interactable element, so the concept of "highlight" doesn't really apply to them. It is possible to implement it in script if required.
But I agree that all controls should offer other text alignment options, at least right-alignment.
I opened a summary proposal thread for GUI controls:
https://www.adventuregamestudio.co.uk/forums/editor-development/gui-controls-update-proposal/