To use the IP generated from System Generator, you need to create a new project, or open an existing project that targets the same device as specified in System Generator for creating the IP.
Select IP Catalog in the Project Manager, and right-click an empty area in IP Catalog window. Select Add Repository, and add the directory that contains your new IP.
Once the IP is added to the IP catalog, you can include it in larger designs just as you would with any other IP in the IP catalog.