Gmail Connect is a native app for Windows 8 and Windows RT that combines modern touch-friendly UI with true power of google mail. Unlike built-in mail client, Gmail Connect groups messages in threads in exactly the same way Google does and provides access to many gmail features such as server-side search in entire mails database, stores message drafts on the server, shows all labels assigned to message etc.
Unlike other so-called “gmail client apps” it’s a truly native windows 8 app with original UI in Windows 8 style, support for live tiles and start screen notifications and fully functional in both portrait and landscape orientations as well as in snap mode.
Application allows you to use multiple gmail accounts at the same time.
And if you miss some gmail features in the new UI you can always switch to online gmail by clicking “in browser” button without losing context.
Please note, that it’s an online client for gmail so you need to have permanent internet connection to browse mails.