If you log into the fgt, (GUI) the registering information can be found on the dashboard under License Information.
New hardware is usually not registered, so you likely need to do this first by logging into the support site and click on the Asset->Register/Activate then enter the serial number for your fgt device.
After this, you can check under Asset->Manage/View Products->device, then click on either General or Entitlement.
Once the fgt is registered, and providing it can access the Internet, the subscription/license info should start to turn green checkmarks.
