http://docs.sdkbox.com/en/api/gpg/js/index.html
Please check this, i really need it!!!
Thanks I am asking the SDKBOX team about this.
http://docs.sdkbox.com/en/api/gpg/js/index.html
The link has been updated.
http://docs.sdkbox.com/en/plugins/googleplay/v3-js/#api-reference
Fixed.
Thanks,