Jet Express for Microsoft Dynamics GP is an entry level Excel-based reporting solution, available as a free download starting in June
MS Dynamics World covers the new Microsoft and Jet Reports Announce Excel-based Reporting for Dynamics GP
Microsoft and Jet Reports Announce Excel-based Reporting for Dynamics GP – MSDynamicsWorld.com
Archived post from 2016. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.