Google Maps now has proper support for GeoJSON, so you should probably use that instead. @param {Object} geojson A valid GeoJSON object. One of Point, LineString, Polygon, MultiPoint, MultiLineString, ...
Whether you need to parse existing GeoJSON from a file or web server, or create new GeoJSON from user input, this library has got you covered. Parsing existing GeoJSON is only half the fun! Why not ...