When you open up gomo authoring you'll see an Integrations button in the toolbar:

Click the Settings button and you'll be able to add your NetDimensions end point(s)

When you come to publish a gomo project from your account you'll see the NetDimensions publish option:

The first time you publish via this route you'll be promoted for your NetD credentials:


However, the next time you publish via this route you won't need to re-authenticate