I know it's been a long time, but I want to post a solution here for people in the future.


Instead of the `important` label, you should use `^iim`. https://mail.google.com/mail/feed/atom/^iim

This will show a list of emails in your inbox that are unread and marked as important. I have "priority inbox" enabled on my end, not sure if it's necessary for the link to work as expected.

You can find other special gmail labels [here](https://developers.google.com/gmail/android/com/google/android/gm/contentprovider/GmailContract.Labels.LabelCanonicalNames).