To simply things for everyone, David Musgrave has pulled together all of the Documentation for the Word Templates feature in Microsoft Dynamics GP 2010 into one place.
Er…that would be David Bader. Apparently I give David Musgrave too much credit.
Documentation for the Word Templates feature in Microsoft Dynamics GP 2010 – Dynamics GP Support and Services Blog – Site Home – MSDN Blogs
Microsoft & the GP EcosystemExcel & OfficeGP 2010
Archived post from 2011. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.