David Musgrave looks at Developing using Dexterity for Microsoft Dynamics GP 2015
Developing using Dexterity for Microsoft Dynamics GP 2015 | David Musgraves Winthrop Development Consultants Blog
Development & IntegrationMicrosoft & the GP EcosystemGP 2015
Archived post from 2015. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.