Yes it is work with some GUI issues (as I mentioned here). With modification via LuCi, for basic configuration:
Network -> Interfaces - WAN - choose WAN port (physical or VLAN if you need)
Network -> Devices - br-lan - choose lan ports
So is in future, it will be possible to expose all RJ45 interfaces for LAN/WAN setting in Gl-Inet Gui ( I have no ideas how is it hard/time-consuming for your team)?