Scaling GUI In Unity OLDUI

GUIManager.cs

// In most games I need a touch of OLD Unity GUI and for that I need a scaling GUI solution, most out there just don't seem to really work for me.
// So I made my own with a very simple method, most designs rely on a target device resolution, if you know what that is.
// It essentially means everytime I design something I design GUI for ONE resolution and so I want it to scale to every resolution.

// So first we define our design resolution.
// For the example we chose a common portrait resolution.
[SerializeField]
private Vector2 DesignResolution = new Vector2(480,800);
// Now we need our Scale variable to store the difference between the design resolution and new.
[SerializeField]
private Vector2 Scale = Vector2.Zero;

// After we do that we would need to make sure to do the calculations and store them within an update function, especially if the
// Orientation or rotation changes during gameplay.
private void Update()
{
	Scale.x = Screen.width/DesignResolution.x;
	Scale.y = Screen.height/DesignResolution.y;
}

// Now that we have the difference added to our scale variable, we make a new custom function for GUI RECT to except our scale function.
// Just add this anywhere in the same script.
// <Left,Top,Width,Height,Scale.x+Scale.Y>
private Rect ScaleRect(float l,float t,float w,float h,Vector2 s)
{
	return new Rect(l * s.x,t * s.y,w * s.x,h * s.y);
}

// Now we just simply utilize our function and scale like so.
private void OnGUI()
{
	GUILayout.BeginArea (ScaleRect(15,105,450,590,Scale));
	// etc..
	// and when you run this function you'll see it works flawlessly
	// In order for this to work you need to understand your design resolution and use the design resolution as gui cordinates.
	// For instance I subtracted 30 from the width to make it add 15pixel space on each side (pre-scale), then
	// when it scales it divies up the difference and upscales the space accordingly or downscales by appropriate amounts mathematically sound.
}

If you need any help using this, just leave a comment. I thought this was worth posting as I use this method a lot and it doesn't seem to be found anywhere else. Hope it helps!