trying to use get component with find game object: error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer

So i have amy game objects here: public GameObject GameGUI; public GameObject redHP; public GameObject blueHP; public GameObject GUIElement; public GameObject Specialobj; public GameObject HPtext; public GameObject SPtext; public GameObject Ammotext; public GameObject Cliptext; public GameObject DownTime;

then in the start method i find and assign the game objects in the scene (since this is a network game and I'm spawning players I have to use findgameobject and cannot directly asian into the inspector also this will make it easier later to make new characters/players)

         /// SET GUI:
         Ammotext = GameObject.FindGameObjectWithTag ("GUIElement1"); //
         Cliptext = GameObject.FindGameObjectWithTag ("GUIElement2"); //
         SPtext = GameObject.FindGameObjectWithTag ("GUIElement3"); 
         HPtext = GameObject.FindGameObjectWithTag ("GUIElement4"); 
         Specialobj = GameObject.FindGameObjectWithTag ("GUIElement5"); 
         GUIElement = GameObject.FindGameObjectWithTag ("GUIElement6"); 
         blueHP = GameObject.FindGameObjectWithTag ("GUIElement7"); 
         GameGUI = GameObject.FindGameObjectWithTag ("GameGUI"); 
         DownTime = GameObject.FindGameObjectWithTag ("DownTime"); 
 
         GameGUI.SetActive (true);
         DownTime.SetActive (false);

last in update i am now trying to assign the game objects to getcompoonent to assign the variables to the GUI element here i run into problems.

error CS0131: The left-hand side of an assignment must be a variable, a property or an indexer for all these lines (no idea why when they are defined as a game object in START)

     blueHP.GetComponent<Image>().fillAmount = currentHealth; // 100 == fill;
         Specialobj.GetComponent<Image>().fillAmount = Special; // 100 == fill;
         Ammotext.GetComponent<Text> = Ammo.ToString ();
         Cliptext.GetComponent<Text> = clips.ToString ();
         HPtext.GetComponent<Text> = currentHealth.ToString ();
         SPtext.GetComponent<Text> = Ammotext.ToString ();

//still working on this :D full script:

 using UnityEngine;
 using System.Collections;
 using UnityEngine.Networking;
 using UnityEngine.UI;
 
 public class PlayerControll : NetworkBehaviour {
 
     private float turnspeed = 23;
     private float FireRate  = 0.03f;
     public float thrustSpeed = 12;
     public float BoosterSpeed = 16;
     public static float Special = 0;
     public static float Ammo;
     public static float Maxammo = 650;
     public static float clips = 3;
 
     [SyncVar(hook = "OnChangeHealth")] public int currentHealth = maxHealth;
     public const int maxHealth = 100;
 
     public GameObject MachGuns;
     public GameObject Explosion;
     public Transform GunsSpawn;
     public AudioClip GunSound;
     private GameObject[] Spawnpoints;
     public GameObject Spawnpoint;
 
     public ParticleSystem Thruster;
     public ParticleSystem Thruster2;
 
     public GameObject GameGUI;
     public GameObject redHP;
     public GameObject blueHP;
     public GameObject GUIElement;
     public GameObject Specialobj;
     public GameObject HPtext;
     public GameObject SPtext;
     public GameObject Ammotext;
     public GameObject Cliptext;
     public GameObject DownTime;
 
     int index;
 
     //-------------------------------------------------------------------------------------------
 
     // Use this for initialization
     void Start () {
         
             // make sure their are carriers.
             Spawnpoints = GameObject.FindGameObjectsWithTag("EarthAI2"); 
             index = Random.Range (0, Spawnpoints.Length);
             Spawnpoint = Spawnpoints [index];
             Spawnpoint = Spawnpoints [index];
             this.transform.position = Spawnpoint.transform.position;
             //PUT PLAYER AT CARRIER WHEN SPAWN.
 
                 if (Ammo == 0) {
                     Ammo = Maxammo;
                 }
 
         /// SET GUI:
         Ammotext = GameObject.FindGameObjectWithTag ("GUIElement1"); //
         Cliptext = GameObject.FindGameObjectWithTag ("GUIElement2"); //
         SPtext = GameObject.FindGameObjectWithTag ("GUIElement3"); 
         HPtext = GameObject.FindGameObjectWithTag ("GUIElement4"); 
         Specialobj = GameObject.FindGameObjectWithTag ("GUIElement5"); 
         GUIElement = GameObject.FindGameObjectWithTag ("GUIElement6"); 
         blueHP = GameObject.FindGameObjectWithTag ("GUIElement7"); 
         GameGUI = GameObject.FindGameObjectWithTag ("GameGUI"); 
         DownTime = GameObject.FindGameObjectWithTag ("DownTime"); 
 
         GameGUI.SetActive (true);
         DownTime.SetActive (false);
 
     }
     //-------------------------------------------------------------------------------------------
 
     // Update is called once per frame
     void Update () {
 
         blueHP.GetComponent<Image>().fillAmount = currentHealth; // 100 == fill;
         Specialobj.GetComponent<Image>().fillAmount = Special; // 100 == fill;
         Ammotext.GetComponent<Text> = Ammo.ToString ();
         Cliptext.GetComponent<Text> = clips.ToString ();
         HPtext.GetComponent<Text> = currentHealth.ToString ();
         SPtext.GetComponent<Text> = Ammotext.ToString ();
 
         if (Ammo < 1) {
             clips -= 1;
             Ammo += Maxammo;
         }
 
         ///GUI CONTROLL
 
         //-------------------------------------------------------------------------------------------
         // INPUT GET AXIS CONTROLL
 float horizontal = Input.GetAxis ("Horizontal") * turnspeed;
         float vertical = Input.GetAxis ("Vertical") * turnspeed;
         horizontal *= Time.deltaTime;
         vertical *= Time.deltaTime;
         transform.Rotate (Vector3.up, horizontal);
         transform.Rotate (Vector3.right, vertical);
 
         if (Input.GetButtonDown ("Fire1")) {
             if (FireRate < 0.01f && Ammo >0) {
                 CmdFire ();
                 FireRate = 0.03f; // resetfirerate
                 Ammo -= 1;
             }
         }
 
             if (Input.GetButton ("Boost")) {
                 transform.Translate (Vector3.forward * BoosterSpeed * Time.deltaTime);
                 Thruster.startLifetime = 4f;
                 Thruster2.startLifetime = 4f;
             }
 
             if (Input.GetButtonUp ("Boost")) {
                 transform.Translate (Vector3.forward * BoosterSpeed * Time.deltaTime);
                 Thruster.startLifetime = 1f;
                 Thruster2.startLifetime = 1f;
             }
 
         //firate controll:
         FireRate -= 0.01f;
     }
 // [ ... snip ...]
 }