If developers want to test Google Maps or any other Google service like Gmail,Youtube, Google drive etc. then they first need to install Google framework on Genymotion. Here are the steps:-
4.4 Kitkat 5.0 Lollipop 5.1 Lollipop 6.0 Marshmallow 7.0 Nougat 7.1 Nougat (webview patch)
Reference:- Stack overflow question on this topic