On my Gargoyle 1.3.5 running on a TP-Link TL-WR1043ND (ar71xx) I have enabled remote SSH access and changed the port for both local and remote access to 8022. The change is accepted and saved by the GUI, but is ignored by dropbear which keeps binding to the port 22.
Also, the "Reboot -> Reboot Now" does not work (unlike the shell "reboot" command issued over the SSH connection).