GUI problem

I dont how to make my GUI aline itself when the screen resolution is change on the .exe.
The problem is in the game editor, when I play it, the GUI is alined base on my preference but the moment I build it and choose a different resolution, the GUI goes nuts. can you give me some solution to this problem ? thanks

Instead of setting where the gui is with a set figure e.g. 500 you could just set it to something like 2/Screen.height