Hi Martin
Unfortunately, we do not have a way for you to style Google Maps beyond some basic adjustments like height. If you think that is something you would like as a feature I encourage you to visit our User Voice Page and either upvote an existing request or make a new request there.
You can suggest it it http://tribe.uservoice.com.
You can see if Google provides a way that you could override the maps styling, but we’re limited in helping with styling customizations, per our Scope of Support / Terms.
Is there anything else I can help you with?
Thanks
Courtney 🙂