Quick information for Brazillian users (or nearby) who may find this gateway on the market.
Radioenge has developed a gateway for LoRaWAN applications (more info here: https://www.radioenge.com.br/solucoes/iot/18-gateway-lorawan.html ) based on Raspberry Pi3. If you want to use it with ChirpStack infrastructure (I’m using GatewayOS 3.3.0-test5), you can set it up by using the preset RisingHF RHF0M301, which has a similar pin-out. It has been working fine on my setup.
Enjoy!