gnng appears to only list interfaces with IP addresses. This is slightly confusing, as the documentation states:

gnng - Fetches network devices interfaces and displays them in a table view.

Fetches interface information from routing and firewall devices. This includes
network and IP information along with the inbound and outbound filters that
may be applied to the interface. Works on Juniper, Netscreen, Foundry, and Cisco
devices.

It includes network and IP information, but the documentation does not state that it excludes interfaces without IP addresses. In many cases, it may be desirable to see all ports, regardless of whether it's a routed interface or not.

Even if it's undesirable to list ports that don't have IP addresses, maybe the documentation should be updated at the least to indicate it won't retrieve interfaces without IPs.