Kyoto Station, Central Ticket Gate — the gate on the Kyoto Tower side, near a 7-Eleven. Look for a "GuideMe Japan" board. Please arrive 5-10 minutes early; latecomers cannot be admitted. The tour ends at Kinkaku-ji, not Kyoto Station.
The tour ends at Kinkaku-ji, not back at Kyoto Station. From here you can take a bus to central Kyoto or Arashiyama, or continue exploring the northern temples on your own. The bus stop is a short walk from the exit.