title: Custom Info Window for Google Maps
body: <p>I'd like to make a custom Info Window for Google Maps for iOS like the photo below. Is it possible to extend GMSOverlay like GMSMarker, GMSPolyline, and GMSPolygon do to create custom graphics?  </p>
  
  <p><img src="https://i.stack.imgur.com/lsJKE.png" alt="enter image description here"></p>