Is your feature request related to a problem? Please describe.
GUI's are pretty cool, which is why support for all of them would be nice.

Describe the solution you'd like
Create a new event or category or whatever to add GUI classes. Something like gui.(guiclassname)=GUI. I say guiclassname because I'm not sure if all GUI's have localized names or if it is even possible to localize a GUI name, because the GUI names aren't always shown in the GUI.

Describe alternatives you've considered
Use the area event for areas next to the things with the GUI's I want support for.

Additional context
No.

This is easy to do, I have added this for some of the screens that are more used, I thought to add for the other screens too but I don't know if people will have the patience to add events for screens like "the horse screen", me myself don't have that kind of patience but.... I will see