This has been a long time comin. In a Feature of the day Microsft looks at Select Printer at time of Print
Feature of the Day: Select Printer at time of Print – Inside Microsoft Dynamics GP – Site Home – MSDN Blogs
Install, Upgrade & AdminTips & Hidden FeaturesMicrosoft & the GP Ecosystem
Archived post from 2012. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.