Making my GUI Button Movable in Play mode

I have been working on the below code and realy like it but is there any way I can make is so that the player can move the GUI button where ever they would like it to be. Here is how I coded my GUI button Up.

 using UnityEngine;
 using System.Collections;
 
 public class Mounting : MonoBehaviour {
     private bool isMounted = false; //This decides if we should be doing mounting or not.
     private GameObject hoverBoards; //Place Holder For the Search.
     private string button1Text; //Reqired for gui Text.
     public GUISkin Location1Button; // GUI Skin For Text.
     public Transform thisChar;  //The Character you would like to put on mount.
     public Transform spawn; //The spawn location needs to be an object that is parented to your character. 
     public GameObject prefabToSpawn; //This is the mount we are going to spawn.
 
 
     
     void OnGUI()//Starts Our GUI Function
         {
     
             GUI.skin = Location1Button;    //Turns our GUI Skin On.
         
         
             if(isMounted == true)//Checks if we are mounted.
             
                 {
             
                     if (GUI.Button(new Rect(350, 100, 65, 65),button1Text))//Checks if the button has been pushed.
                         {
                             thisChar.GetComponent<ThirdPersonController>().enabled = true;//Turns on the Third Person Controller.
                             thisChar.transform.parent = null;//Makes the character not parented to anything.
                             hoverBoards = GameObject.Find("Hover Board(Clone)");//Find the Hover Board.
                             Destroy(hoverBoards);//Destroys the hover Board.
                             isMounted = false;//Tells us that we are not mounted.
                         }
             
                 }
             if(isMounted == false)//Checks if we are mounted.
                 {
 
             
                     if (GUI.Button(new Rect(350, 100, 65, 65),button1Text))//Chekcs if the button has been pushed.
                         {
                             GameObject clone = Instantiate(prefabToSpawn,spawn.position, spawn.rotation)as GameObject;//Spawns the hover board.
                             thisChar.transform.parent = clone.transform;//Sets the character as a child of the mount.
                             thisChar.GetComponent<ThirdPersonController>().enabled = false;//Turns off the third person controller.
                             clone.GetComponent<HoverBoards>().enabled = true;//Turns on the hoverboard script.
                             isMounted = true;//tells us that we are mounted.
                         }
              
                 }
         
         }
 }