Garmin DriveSmart 55 GPS navigator 5.5 For drivers who love new adventures while traveling, the Garmin DriveSmart 55 GPS navigator is the ultimate road trip companion. Featuring simple menus and easy-to-read maps, Garmin DriveSmart 55 lets you view turn-by-turn directions at a glance on a bright 5.5" edge-to-edge touchscreen display.