Continuing their look at SP2 features, is a Microsoft Dynamics GP 2013 Service Pack 2 Feature of the Day: Attached Document Tracking from the GP team.
Microsoft Dynamics GP 2013 Service Pack 2 Feature of the Day: Attached Document Tracking – Inside Microsoft Dynamics GP – Site Home – MSDN Blogs
Install, Upgrade & AdminTips & Hidden FeaturesMicrosoft & the GP EcosystemGP 2013
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.