After upgrading my iPad to iOS 6 the default mail app stopped connecting to the Gmail server to receive or send mail. Its not clear why this happened, but it stopped working completely. I had been using my mail via the Gmail account option rather than the Exchange server one. I have now updated my previous article on synchronisation and tested Gmail using this method in the standard email app. It is working perfectly and the new mail notifications are being pushed in real time.
To read how to fix it and set it all up go here:
How to set up an iPad to synchronise with Google Calendar and Gmail.