Draw a Rect using GUI.DrawTexture on exactly gameobject's position Unity - unity3d

Question

I have to use the "GUI.DrawTexture(new Rect..." function to draw a rectangle on my screen(actually, it's a gradient GUI bar i got from https://www.assetstore.unity3d.com/en/#!/content/19972, but deep inside it's just a rectangle). I want to do it right beside a gameobject i have on my screen.
The problem is: It seems like rectangle's coordinates are not the same as a gameobjects coordinates(i have searched online and i guess it's true). I have tried the function below to convert a gameobject's position to a rectangle's coordinates but still no luck:
public Vector2 WorldToGuiPoint(Vector2 position)
{
var guiPosition = Camera.main.WorldToScreenPoint(position);
guiPosition.y = Screen.currentResolution.height - guiPosition.y;
return guiPosition;
}
My best strike was when i did this:
Vector3 gameObjectsPosition = Camera.main.WorldToScreenPoint(gameObject);
And then when i wanted to draw the rectangle i did:
GUI.DrawTexture(new Rect(gameObjectsPosition.x, Screen.height - gameObjectsPosition.y, Background.width * ScaleSize, Background.height * ScaleSize), Background);
But still, the Rect isn't on the exact gameObject's position. It's x is right but y don't and when i searched the internet, they said I only had to do the "Screen.height - gameObjectsPosition.y" when drawing the Rect. It didn't work for me, the y is still wrong.
What should i do to create a rectangle that's like, right beside a current gameobject on screen (like, if the gameobject's position is x = -401 and y = -80, i want it on y=-80 and x=-300)

Answer 1

You need to use Screen.height instead of
Screen.currentResolution.height
using UnityEngine;
using System.Collections;
public class GuiPosition : MonoBehaviour
{
public Vector2 WorldToGuiPoint(Vector3 GOposition)
{
var guiPosition = Camera.main.WorldToScreenPoint(GOposition);
// Y axis coordinate in screen is reversed relative to world Y coordinate
guiPosition.y = Screen.height - guiPosition.y;
return guiPosition;
}
void OnGUI()
{
var guiPosition = WorldToGuiPoint(gameObject.transform.position);
var rect = new Rect(guiPosition, new Vector2(200, 70));
GUI.Label(rect, "TEST");
}
}
I've just tested attaching that MonoBehaviour to a Cube GameObject and it works