[Q] Can't uninstall Gmail app obtained from Market

---

Upon first use of my new Viewpad 7, I set up my Gmail account on the Email app. Then, later I got the Gmail (version 2.3) app from Market and installed it. I now am getting double (simultaneous) notifications. Ugh. I've tried to uninstall the Gmail app that I downloaded and installed, but cannot do so. In Applications / Manage Applications / All / Gmail, I can Force Stop or Clear data or Clear cache, but the Uninstall button~bar is greyed out. There are no additional menu options at this screen.

If I try to delete my Gmail account in the Email app, it warns me that this can only be done with a factory reset. Since that would eliminate the dozen or so apps I found and downloaded from Market, I don't want to do that. Why can't I uninstall the Gmail app?