The Tor connection padding part in the Whonix-Gateway Security page should be removed or redone.
It says that setting it to 1 helps against traffic analysis attacks and the System Hardening Checklist says that it improves anonymity but this isn’t true. Connection padding is enabled by default with the “auto” option. This makes it send padding cells if the client and relay support it. Setting it to “1” will make it send it anyway which is basically useless as the relay doesn’t support it.
I doubt there will be any benefits by setting it to 1.