Garmin.com/express | Garmin express makes it simple to refresh all maps and programming in Garmin gadget. You can undoubtedly get the updates of Garmin map on Garmin official site garmin.com/express or Garmin Express application. Google refreshes come in each 3-4 months for Garmin maps with the goal that you need to refresh maps in your Garmin GPS gadget. Garmin Login.