Thank you for trying to help me 
I do know how ADR etc. works, and we do save the whole frame in our database for each uplink. All I wanted to do was using the API described here
https://www.thethingsindustries.com/docs/reference/api/gateway/
https://www.thethingsindustries.com/docs/reference/api/gateway_server/
to monitor all my gateways, and don’t have to look in my database and manually add/remove every time we install a new gateway. This is only a PoC project so I was just hoping to make something quick using the API to test with.
It seems like this New API for gateway mapping, status and info is gonna be the new API to use moving forward, so I think I will take a look in to that instead.
Thanks for the feedback