Unity Grouping Tool

using UnityEditor;
using UnityEngine;

public class GroupingTool : MonoBehaviour
{
    private const string parentName = "New Parent";

    [MenuItem("Tools/Group Objects %g")]
    private static void GroupObjects()
    {
        GameObject newParent = new GameObject(parentName);
        GameObject[] selection = Selection.gameObjects;

        foreach(GameObject go in selection)
        {
            try
            {
                if (go.transform.parent)
                {
                    continue;
                }

                go.transform.parent = newParent.transform;
            }
            catch(System.Exception e)
            {
                Debug.LogError(e.Message);
            }
        }
    }
}