Moved your post to it's own thread since it was unrelated to the thread you posted to. 😉
GoCentral, being a web builder application, is limited in what you can add or customize. In the case of adding a plugin that's not possible. In that case you would want to consider moving to WordPress.
Judith "Many of life's failures are people who did not realize how close they were to success when they gave up." ~Thomas Edison