Cal. Veh. Code § 13375

For the purposes of this article, any plea or verdict of guilty, plea of nolo contendere, or court finding of guilt in a trial without a jury, or forfeiture of bail, is deemed a conviction, notwithstanding subsequent action under Section 1203.4 or 1203.4a of the Penal Code allowing withdrawal of the plea of guilty and entering a plea of not guilty, setting aside the verdict of guilty, or dismissing the accusation or information.