Excuse me, is there a gas station near York ?

If you are using Google Navigation, there is a search icon in the navigation state on the top right. Click on it and you will see options such as gas stations and convenience stores. Click on the gas station symbol 🚽 and it will show all gas stations along your route, as well as indicate how much time it will take to detour. Select a point you think is suitable and Google will automatically add it as one of your stop points.

Found it on Google Maps.