No, it's not based on Google Maps. There are three json sources of information about gas stations and prices:
- http://min-go.hr/cache/postajasve.json
- http://min-go.hr/cache/vazeca-cijena.json
- http://min-go.hr/api/web_api/web/obveznik

Hi, the source is http://min-go.hr/, but I've made a mistake in my script. I'm reverting changes.