Show custom data on a google map highlight on mouse hover

I want to show custom data on google map which highlight on mouse hover and can be select or de-select on click and data which is clicked get through ajax.

Here is the refernce map which is shown in following link under Verteilgebiet planen tab :

https://www.prospektmanager.de/verteilung-planen

The link on which i am working in here :

 http://162.144.215.8/~site4brandz/wp/prospektmanager/verteilung-planen-old/