Geo Location

On secure(https) pages browser like default navigator functions will work.

navigator.geolocation.getCurrentPosition(success, error, [options])

For reference can follow the link below.

Geolocation: getCurrentPosition() method - Web APIs | MDNMDN Web Docs

You'll need to import the javascript file in your website before starting from this link.

To get GPS Status of device

Plain Javascript

WTN.isDeviceGPSEnabled({
    callback:function(data){
        console.log(data.value);
    }
});

ES5+