[Commodore]

Do a search for Flash2Pass and click garage door openers. They sell a device that works with any remote door or gate. It is triggered by you flashing your hi beams (no noisy horn). Simple installation (15 minutes tops) and uses the code from your existing remote. It's small and easy to hide. It's basically an affordable 'home link'. I put one in my roadster and wife's Subaru almost two years ago. Great gadget and easily transferred if a new car is in your future.
RB