This is a big Microsoft Dynamics GP 2015 Feature of the Day: Service Based Architecture Deployment Even if you don’t realize it yet, pay attention to this.
Microsoft Dynamics GP 2015 Feature of the Day: Service Based Architecture Deployment – Microsoft Dynamics GP Community
Development & IntegrationTips & Hidden FeaturesMicrosoft & the GP EcosystemGP 2015
Archived post from 2014. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.