Gmail – Enable Tab Type inbox in Gmail

It doesn't look like you can. When configuring a custom section for Priority Inbox, your option for messages is either:

Inbox and one of (Important and Unread, Important, Unread, Starred)

OR

All from one particular label.

You can't define a search (label:my-label is:unread for instance) for a priority inbox section.

This is feature is not currently available. You can suggest new features (and vote for the most common suggestions) here: http://mail.google.com/support/bin/request.py?contact_type=suggest (perhaps using the "I have another idea" option at the bottom)

Source: https://productforums.google.com/forum/#!topic/gmail/fbzQMggCzzw