If you have a Dragino Gateway LG01 or LG02 you know it’s sucks if you are trying to use with LoRaWAN, the main reason it’s not an 8 channel gateway.
Last year I try to fix my LG01 single-channel problem and today I tried to connect an 8 channel concentrator and works!
I’m using the RAK2245 and works fine, others concentrator should work too.
The last firmware did all the job, just need to find the right pins to connect.
If you want to do the same check the link.