Ian Grieve explains How To Configure Microsoft Dynamics GP 2013 Web Services Runtime
How To Configure Microsoft Dynamics GP 2013 Web Services Runtime | azurecurve
Development & IntegrationTips & Hidden FeaturesMicrosoft & the GP EcosystemGP 2013
Archived post from 2013. Dynamics GP and the links it points to have changed since; check current documentation before relying on version-specific steps.