EnemySpawner.cs

private void OnDrawGizmos()
{
#if UNITY_EDITOR
    var wave = GetComponentInParent<Wave>();

    var name = string.Format("{0}\r\n{1}", wave != null ? wave.name : "NOWAVE", gameObject.name);

    bool isSelectedWave = transform.IsInCurrentSelectedWave();

    Gizmos.color = isSelectedWave ? Color.green : Color.gray;

    Gizmos.DrawSphere(transform.position, 0.5f);

    if (isSelectedWave)
      GizmosUtils.DrawText(GUI.skin, name, transform.position + Vector3.up, Color.green, 14, 5f);
#endif
}