Convergence at your Fingertips–Mobile App Now Available! The apps are out. Apps for iOS, Windows Mobile, Android, Windows 8.1 and a mobile web page.
Convergence at your Fingertips–Mobile App Now Available! – Microsoft Dynamics Convergence – Site Root – Microsoft Dynamics Community
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.