If I understand correctly, yes this can work. Basically you have different sub-region configs and each gateway is tied to one of these sub-regions (_0, _1, _2, …). Make sure you configure the MQTT topic prefix correctly 
If I understand correctly, yes this can work. Basically you have different sub-region configs and each gateway is tied to one of these sub-regions (_0, _1, _2, …). Make sure you configure the MQTT topic prefix correctly