Thanks to the quick tip from @apneadiving, this took care of it:
lat = 41.0
lng = -96.0
options =
center: new google.maps.LatLng(lat, lng)
zoom: 14
handler = Gmaps.build('Google')
handler.buildMap { provider: options, internal: { id: 'contact-map' } }, ->
marker = handler.addMarker
lat: lat
lng: lng