Can I change the in-game general GUI for the player through triggers?

Hi

I am talking about the HUD you get when you pick a certain race, like Undead have a bone and undead look to the HUD etc.

I was wondering if simple triggers can change the GUI for the players in-game or do I need to know JASS?

I am not creating a new GUI or anything, I just want to know if a trigger can just change the GUI to one of the basic race GUIs

Nope, and even if you could, it would look very strange to the player, because the GUI would just suddenly flash into another GUI.

Thank You