How to use fitBounds of GMaps.js

I am using GMaps.js and I have several points to show, I need to show all and set the zoom to the point, I was watching the documentation and requests an array of google.maps.LatLng type. I have the following code

for (x in geo){
var item  = new google.maps.LatLng(geo[x]["latitud"], geo[x]["longitud"]);
arrayBound.push(item);
}
map = new GMaps({
div: '#divMapa',
lat: latWS,
lng: lngWS,
zoom: 13
});

map.fitBounds(arrayBound);