There aren't many packages available that directly pertain to gateways (in fact, I found just one). gwled allows you to use the LEDs on certain embedded devices (for example, ALIX, WRAP, Soekris) to monitor gateways. After you install the gwled package, a new option will appear on the Interfaces menu called Gateway Status LEDs. Navigating to Interfaces | Gateways Status LEDs allows you to control the options for this package. Upon installation, gwled is not enabled by default, but by checking the Enable gwled checkbox, you can enable it. The package allows you to monitor the gateway using LEDs #2 and #3 on supported devices; you need to enable each LED individually using their respective checkboxes. There are also drop-down boxes for each LED which enable you to control which gateway each LED monitors.