How to connect rak 831 to raspberry pi on gateway os

hey guys i have a rak 831 and a raspberry pi . i am pretty new to this i .i installed gateway os on my pi,but after that i am pretty much clueless on how to proceed. Can someone help me with any tutorials or links?
i want to know how to add my gateway to my chirpstack server.i do not know how to get the EUI number and all

The software side of things would be the same as that for any more recent SPI mode sx1301 based concentrator, differing perhaps only in the reset pin GPIO (depending on how you wired it up).

So you could follow a guide for a RAK2247 or similar.

Have you seen this guide? Getting started - ChirpStack open-source LoRaWAN<sup>®</sup> Network Server