Hey, Soumitra Gupta. Thanks for reading!
Thanks to alert me about it! I think that I need to complement with this information.

To handle with iOS you can create another OAuth Cliente ID to iOS. After you will get the REVERSE CLIENT ID. That basically the reverted CLIENT ID.

Example:

CLIENT ID: 899414908484–123abc.apps.googleusercontent.com
REVERSE CLIENT ID: com.googleusercontent.apps.899414908484–123abc

Use this information as REVERSED_CLIENT_IDvariable when install plugin.

Get more details at https://github.com/EddyVerbruggen/cordova-plugin-googleplus#4-installation-phonegap-cli--cordova-cli