The GP Support Team is on the workflow 2.0 bandwagon now. Workflow 2.0’s Workflow User Setup window options: part 1: People and Groups
Workflow 2.0’s Workflow User Setup window options: part 1: People and Groups – Microsoft Dynamics GP Community
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.