Curious, is it possible to link in OpenWISP to manage different RAK Gateways ? ( https://openwisp.org/ )
You might be able to work out how to do so on your own, but I don’t believe there’s any official support for that.
The “developer gateways” are typically Raspberry Pi based, you’d have to see if there’s support for managing such and not just the OpenWRT systems your tool was designed for.
Many of the “industrial” RAK gateways are OpenWRT based, but they’re sold as turnkey products rather than customizeable platforms. You can modify them, but only on your own with no official support for doing so.