This isn't the right forum, so hopefully someone can move it. Where are you trying to add the gas station?
The other option is to add it using the app. To do this you need to be at the station. Tap report then Place. Add a photo and as many details as possible, then submit. It will be added after a senior editor reviews the information and approves the place. This is more likely to happen as you add more details.
Re: New Gas Station