Hi Valdis
Our plugin doesn’t support modifying Google Calendar like that. We do make it possible to customize our plugins by overriding our settings with your own code. For that, check out our Themer’s Guide.
Not the best solution, but other users have opted to not use our integration with Google Maps and instead add their own styled maps to each event instead. https://theeventscalendar.com/support/forums/topic/stlye-google-maps/#post-960723
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.
Is there anything else I can help you with?
Thanks
Courtney 🙂