Our company just moved from Leaflet.js to the Google Maps API; I\'ve search high and low trying to find a simple way of integrating HTML/CSS Markers/Boxes a
You might want to check google.maps.InfoWindow
(https://developers.google.com/maps/documentation/javascript/overlays#InfoWindows) and the google.maps.Marker
(https://developers.google.com/maps/documentation/javascript/reference#Marker) of google maps. Any CSS you apply on the page will be applied to the InfoWindow as well.