If i take the free shuttle bus at Jinshanling service area, does it stop to every gates of wall?

As I know, the bus stops at East Gate in the midway and finally stops at the Front Gate of the Wall. But if you go there during Nov.16~Mar. 15, only the Front Gate is open, the East Gate is closed during that time.

Thank you Kingsle For your reply. So, in Your opinion, if I Would go in the first week of march, and I would follow the route suggested from the site ( from the principal gate to the East one) Iwill be able to exit from East gate? And Will find a shuttle in front of eat gate?

Yes, the east gate can be used for exiting all year round, even from Nov. 16~Mar. 15. The shuttle bus will stop in front of the east gate in the midway but the arriving time is not fixed. If you miss the bus, you can also take a 15 minutes' walk to the Jinshanling Service Area to take the coach back to Beijing.