Many GQueues users have requested the ability to get a daily email of tasks that are due. Building this into GQueues is definitely on my list of improvements to make. However, in the meantime here's a trick you can use to get Google Calendar to send you these emails.
First, make sure you have activated calendar integration for your GQueues account.
Then go to Google Calendar and choose Notifications for the GQueues calendar.
Then check the box to receive an email for your daily agenda.
Now you will receive a message every morning at 5am with the GQueues tasks that are scheduled for the current day.