Problem detecting Mouse Over Gui when scaling it with Matrix4x4

Hi, im having an issue detecting the Mouse pointer over a specific rect when scaling it on GUI. This is what im doing On GUI, and im trying to detect the mouse over gui on the TutoWindowsRect.

void OnGUI(){

         GUI.skin = GUI_Skin;

         Matrix4x4 oldMatrix;
         Matrix4x4 tMatrix;

     static float width = 2048; //Reference resolution
     static float height = 1536; //Reference resolutio

     oldMatrix = GUI.matrix; //Store current matrix
         tMatrix = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, new Vector3(1.0f*Screen.width/width, 1.0f*Screen.height/height, 1.0f)); //Construct matrix to scale to actual view size
         GUI.matrix = tMatrix; //Set the GUI matrix to the scaling matrix
 
         if (GUI.Button(new Rect(width - 96, 20,64,64), "", "TutoButton")){
     
                 if(tutoWindow == false){
                     tutoWindow = true;
                 }else{
                     tutoWindow = false;
                 }
             }
             
             if (tutoWindow == true){
                 
                 TutoWindowRect = GUI.Window(1, TutoWindowRect, TutoWindow, "", "TutoWindow");
             }
         GUI.matrix = oldMatrix; //Set the original matrix back
     }

     void TutoWindow(int WindowID){
         
            if (Time.time - _StartTimeTip > 13){
             _StartTimeTip = Time.time;
             int dado = Random.Range(0,7);
             while (dado == _lastDado){
                 dado = Random.Range(0,7);
             }
             _lastDado = dado;
         }
         GUI.Label(new Rect(50,672,1500, 128),_intro[_lastDado], "Tips");
     }

and here is what im using to detect the mouse over gui.

     void Update(){
         
         float multipX = (float)Screen.width/width;
         float multipY = (float)Screen.height/height;
         bool a = MouseOver2DGUI(new Rect(TutoWindowRect.x*multipX, TutoWindowRect.y*multipY, TutoWindowRect.width*multipX, TutoWindowRect.height*multipY));
         Debug.Log(a);
     }


     bool MouseOver2DGUI(Rect rect){
         
         Vector2 realMousePos = new Vector2 (Input.mousePosition.x, height - Input.mousePosition.y);
         
         bool mouseOver = (rect.Contains(realMousePos));
         
         return mouseOver;
     }

The thing is that the boolean is giving me perfect results on x, width and height but not in the Y position of the rect. Maybe the logic im using for this is wrong somewhere i cannot find, i hope someone can help me, thank you very much.