How to choose a marker by coordinates or title?

I have a map with dynamically generated markers using gmaps.js. And it works.

But I would like to select a marker by coordinates and click on it.

I know how to run it, but I can’t figure out how to select the marker correctly in jQuery or find it in the map.markers array?

This is my code:

# = require lib/gmaps
$(document).on 'ready', ->

  if $('#map').length > 0
    map = new GMaps(
      div: "#map"
      lat: 53.5500000
      lng: 10.0000000
      zoom: 12
    )

    url = "nearby_cardiologists.json" + window.location.search
    $.getJSON url, (data) ->
      if data and data.length > 0
        firstMarker = data[0]
        map.setCenter firstMarker.latitude, firstMarker.longitude

        $.each data, (index, cardiologist) ->
          cardiologist_info = '<p>' + '<b>' + cardiologist.title + ' ' + cardiologist.first_name + ' ' + cardiologist.last_name + '</b><br>' + cardiologist.street + ', ' + cardiologist.city
          infowindow = new google.maps.InfoWindow(content: cardiologist_info)
          marker = map.addMarker
            lat: cardiologist.latitude
            lng: cardiologist.longitude
          google.maps.event.addListener marker, "click", ->
            infowindow.open map, this

        $("#nearby_cardiologists").on 'click', 'a', (event) ->
          event.preventDefault()
          cardiologist = $(this)
          i = cardiologist.data('id')
          marker = map.markers[0]
          map.setCenter cardiologist.data('coordinates').latitude, cardiologist.data('coordinates').longitude
          map.setZoom 16

      else
        $('#map').hide()

My goal is to click on the link and enlarge + show the info window by opening it or by clicking on the marker