GeoJSON Polygons

You can add a GeoJSON Polygon or MultiPolygon in GMaps.js in the following way:

polygon = map.drawPolygon({
  paths: paths,
  useGeoJSON: true,
  strokeOpacity: 1,
  strokeWeight: 3,
  fillColor: '#BBD8E9',
  fillOpacity: 0.6
});

NOTE: The GeoJSON Polygon should be surrounded by brackets, according the specification.