You can easily add or remove a layer using GMaps.js:
var map = new GMaps({ el: '#map', lat: -12.043333, lng: -77.028333 }); map.addLayer('weather', { clickable: false }); map.addLayer('clouds');
Note: You can choose different layers. Possible values are weather, clouds, traffic, transit and/or bicycling
Note: Be aware that you have to add the library 'weather' in the url for the weather/clouds layer:
http://maps.google.com/maps/api/js?sensor=true&libraries=weather
Note: In the second param you can add your options for the layer as object.
Note: To remove a layer you can use
map.removeLayer('clouds');