Can I use a RN2483 to make a LoraWAN gateway?
It is not possible to create a "full" LoRaWAN gateway using the RN2483 because RN2483 can only listen on one channel. A full gateway needs to listen on multiple channels because LoRaWAN devices randomly select which channel to send on.

However, it is possible to create a single channel gateway. Such gateway would not be LoRaWAN-compatible, but can still solve some use cases. More information: https://www.thethingsnetwork.org/forum/t/single-channel-gateway-with-rn2483/1848