No license are required in order to use and render using the Golaem For Katana plugin.

A Golaem Lite license is only required if you'd like to use the Golaem Layout Tools within Katana. It needs to be installed the same way than the Golaem For Maya licenses. Please check It is also possible to use the same Environment Variables to avoid fetching of licenses or PLE Licenses

Once installed, you can check the status of your license by looking at the Shelf Actions / Golaem About Menu:

If you run the Golaem Layout Tool plugin without a license, it will be in PLE mode. Therefore if you save a Layout File, it will contaminate it and your render will end up with missing meshes.