For synced lessons today and tomorrow, GPS tracking can start automatically — with an offset from calendar time.
More → Settings → GPS tracking. Choose Off, Ask, or Automatic; with Automatic, set start and end offsets.
Tracking continues with the screen locked. Remaining minutes show on the lock screen; the route appears later in the lesson.
Tip: GPS auto-start is available in the mobile app. Start/end offsets and planned starts are in the same settings.