Does anybody know if Garden Hotel in Datong (59 Da Nan Street) an be reached by a shuttle bus from airport?

you mean the DT airport?
If so, the shuttle bus cannot reach your hotel. The shuttle bus reach DT Hotel, which is about 3km to your hotel.
You can take the shuttle bus to reach its terminal and then use a taxi to your hotel. In this way, the taxi fare is around 7RMB.