Rotate object with head movement of cardboard keeping object in focus.

I am developing an android app using unity 3D, where I am trying to keep object in focus and on head movement the object should move relatively to camera. As the object moves in google cardboard demo app (exhibit , mask demo) Object rotates on its axis, when we rotate our head.

I tried with the scripts FocusObject.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class FocusObject : MonoBehaviour {
 
     private GvrHead head;
 
     private Vector3 offset;
     public GameObject scrimshaw;
 
     // Use this for initialization
     void Start () {
         head = Camera.main.GetComponent<StereoController>().Head;
         scrimshaw = GameObject.FindGameObjectWithTag ("monkey");
     }
 
     // Update at end of frame
     void LateUpdate () {
 
         // head.transform.position = the positon of the head on the plane
         // head.Gaze.direction = positon of where the head is looking
         offset = head.Gaze.direction + head.transform.position;
 
         scrimshaw.transform.position = scrimshaw.transform.position + offset;
     }
 }

And I also tried keeping my object inside hierarchy of camera, creating a GameObject and then keeping outside of main camera, But nothing worked.