I don't know much about Zapier, but I have created some awesome GQueues integrations with IFTTT by using my unique GQueues email address (Settings -> General -> Inbox Address ... it looks like XXXXX@
gqueues.appspotmail.com)
I have other recipes to create tasks when I pop up in Mention, when I'm tagged in a FB pic, when I receive a notification on my FB Page (via super hidden RSS feed), when I add something to my YouTube Watch Later queue... I used to have a recipe that pushed all Starred gmails to GQueues, but that became overwhelming for me.
If Zapier has a similar push-to-email-address-with-specific-subject-line, it should work the same way!!!