WPGPlus is a WordPress plugin by johneckman that posts your blog posts to Google+ when published on WordPress blog.
Posts are made to “Public” circle.
This plugin requires PHP 5.
This plugin is based on Dmitry Sandalov’s standalone PHP script for publishing to Google+ from php.
Plugin homepage: https://github.com/DmitrySandalov/twitter2gplus
Download: http://wordpress.org/extend/plugins/wpgplus/