How to make a GUI fit any screen sizes?

Hello, guys I’m having some problem with a script. I have this javascript code:

     var GameName : String = "Game Name";
     var GameType : int = 0;
	 var selStrings : String[] = ["Fighting", "Race", "MOBA", "FPS"];
     
    function OnGUI(){
    GameCreater();
    FinishedWithGame();
    GType();
    }
          
    function GameCreater() {
    GameName = GUI.TextField (Rect (300, 135, 200, 20), GameName, 25);
    }
     
    function GType() {
    GameType = GUI.SelectionGrid (Rect (325,175, 150, 100), GameType, selStrings, 2);
    
   }
        
    function FinishedWithGame(){
     
    if(GUI.Button(Rect(385,350,50,20), "Finish")){
    SaveGame();
    }
    }
     
    function SaveGame(){
    Debug.Log("Saving Game...");
    PlayerPrefs.SetString("Game_Name", GameName);
    }

And I have to make it responsive. I mean, when someone plays it in a 1280x1024 screen, it has to be centered as if it was in a 1024x728 monitor. Can you guys help me please? :slight_smile:

Thanks.

private var rect_test:Rect;

function Start(){
    rect_test = new Rect(0,0, 300,100);
    rect_test.center = new Vector2(Screen.width/2, Screen.height/2);
//OR
    //rect_test = new Rect(Screen.width/2 - 150, Screen.height/2 - 50, 300,100);
}

function OnGUI(){
    GUI.Box(rect_test, "");
}

This will always be in the center of screen.