Gmail app not displaying status bar notifications I recently got an Samsung Galaxy S3, and I prefer the GMail app than the default mail client (the one with the red seal).

The default mail client seems to autocheck for email and displays a notification in the top left corner, but I can't get the native GMail client to do the same. Any suggestions on doing so?
Open GMail, and open its Settings. Click your username@gmail.com, and make sure Notifications is checked. Then, click Inbox sound &amp; vibrate and click Turn Gmail sync on. Configure the Notifications at the bottom as you like.

In Settings, make sure Sync Gmail is also checked.

With regards to GMail sync frequency, see this question: How to set gmail sync frequency?