How to add and remove class from marker using gmaps4rails gem?

Question

Below is my controller code for create new marker

     @vnote_hash = Gmaps4rails.build_markers(@vnotes) do |vnote, marker|

        marker.lat vnote["latitude"]
        marker.lng vnote["longitude"]
        marker.json({:trip_vnote_id => vnote["id"] })

        marker.picture({
         "url" => "images",
         "width" =>  SHOW_SMALL_THUMB_IMAGE_WIDTH,
         "height" => SHOW_SMALL_THUMB_IMAGE_HEIGHT})
     end

in short, i want to do like differentiate click marker and un-click marker.