gistfile1.cs

private Rect rect1, rect2;
private bool stats, gizmos, on;

void OnGUI (){
	on = EditorGUILayout.Toggle (on);
	rect1 = EditorGUILayout.RectField (rect1);
	rect2 = new Rect (0, 22, position.width, position.height);
	stats = EditorGUILayout.Toggle ("stats :", stats);
	gizmos = EditorGUILayout.Toggle ("gizmos :", gizmos);
	
	if (on)
		EditorGUIUtility.RenderGameViewCameras (rect1, rect2, stats, gizmos);
	
	this.Repaint ();
}