Hi Carson,
Great plugin, appreciate your efforts in developing this! Concerning the errors mentioned above, I'm curious to know whether it is still under active development and whether you plan on releasing an update with these fixes included? I've applied both of the suggested patches above and the PHP notices are now gone. However I encountered another one, pertaining to the dashboard widget...
Notice: Undefined index: dashboard_gad in /wp-admin/includes/dashboard.php on line 130
Changing wp_register_sidebar_widget() to wp_add_dashboard_widget() in gad-admin-dashboard.php seems to resolve it...
https://gist.github.com/hypedev/5999188/revisions
Thanks,
Ross