var enableTilt: boolean;
    function OnGUI() {
        if (Input.gyro.enabled) {
            GUILayout.Toggle(enableTilt, "Enable tilt control");
        }
        
        // Other GUI elements...
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public bool enableTilt;
    void OnGUI() {
        if (Input.gyro.enabled)
            GUILayout.Toggle(enableTilt, "Enable tilt control");
        
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public enableTilt as bool

    def OnGUI():
        if Input.gyro.enabled:
            GUILayout.Toggle(enableTilt, 'Enable tilt control')