Help, How can I get variables?

I made a JS script with some static and private variables, and I called it "GameControl" :

 //JS "GameControl" script
 static var currentXP : int = 0;
 static var maxXP : int = 10;
 static var currentLevel : int = 1;
 
 static var currentHealth : float = 45;
 static var maxHealth : int = 45;
 
 static var currentEnergy : float = 27;
 static var maxEnergy : int = 27;
 
 static var currentStrengh : int = 15;
 private var maxStrengh : int = 650;
 
 static var currentAttack : int = 11;
 private var maxAttack : int = 670;
 
 static var currentDefense : int = 20;
 private var maxDefense : int = 760;
 
 private var currentStamina : float = 25;
 static var maxStamina : int = 25;
 
 static var currentCritical : int = 5;
 private var maxCritical : int = 100;
 
 static var currentSpeed : int = 12;
 private var maxSpeed : int = 690;
 
 static var currentHP : float = 15;
 static var maxHP : int = 15;
 
 //...

Then, I made a save data script. But this is a C# script called "SaveAndLoad" :

 using System.Collections;
 using System;
 
 public class DataManager
 {
     GameControl dataVariables;
 
     public float healthData;
     public int maxHealthData;
     public int experienceData;
     public int maxExperienceData;
     public int levelData;
     public float energyData;
     public float maxEnergyData;
     public int attackData;
     public int strenghData;
     public int defenseData;
     public int maxStaminaData;
     public int criticalData;
     public int speedData;
     public int HPData;
     public int maxHPData;
 
     void Start ()
     {
         dataVariables =    GameObject.Find("Player").GetComponent<GameControl>();
     }
 
     void Update ()
     {
         healthData = dataVariables.currentHealth;
         maxHealthData = dataVariables.maxHealth;
         experienceData = dataVariables.currentXP;
         maxExperienceData = dataVariables.maxXP;
         levelData = dataVariables.currentLevel;
         energyData = dataVariables.currentEnergy;
         maxEnergyData = dataVariables.maxEnergy;
         attackData = dataVariables.currentAttack;
         strenghData = dataVariables.currentStrengh;
         defenseData = dataVariables.currentDefense;
         maxStaminaData = dataVariables.maxStamina;
         criticalData = dataVariables.currentCritical;
         speedData = dataVariables.currentSpeed;
         HPData = dataVariables.currentHP;
         maxHPData = dataVariables.maxHP;
     }
 }
 //...

But the debug log says: DataManager.cs(7,9): error CS0246: The type or namespace name `GameControl' could not be found. Are you missing a using directive or an assembly reference?

How can I access those variables? or What I'm wrong?