public Texture p_medal_texture;


    void OnGUI()
       {
 GUI.DrawTexture(new Rect(Screen.width * (3.4f/6.55f),Screen.height * (1.1f/6.3f),Screen.width * (1f/6.55f), Screen.height * (1f/6.3f)),p_medal_texture,
                        ScaleMode.StretchToFill, true, 100.0F);    

      }//c# script


    var p_medal_texture : Texture ;



   function OnGUI ()
      {


GUI.DrawTexture( Rect(Screen.width * (3.4f/6.55f),Screen.height * (1.1f/6.3f),Screen.width * (1f/6.55f), Screen.height * (1f/6.3f)),p_medal_texture,
                        ScaleMode.StretchToFill, true, 100.0F);    

      }//java script 

using this script dynamically resize textures for multiple resolutions and you can also use same for any gui so that it will dynamically resize for multiple resolutions if this is the solution for your problem means up vote it.

Change the main matrix of the GUI class. I usually use GUIUtility.ScaleAroundPivot () for my scaling.

ScaleAroundPivot()? Will that work with Texture2D?