Funny, this works just like expected it to.
Having both Purchase Requisition Approval and Purchase Order Approval workflow types active in the same company database for Microsoft Dynamics GP 2013 R2 and Dynamics GP 2015 in Workflow 2.0. – Microsoft Dynamics GP Community
Install, Upgrade & AdminSales, Purchasing & InventorySQL & DataGP 2015GP 2013
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.