Hi, I see that the RAK7249 DIY Gateway has GPS input.
However it has NTP client so it can get accurate time over the network. 
It would need even better GPS time if it support localization but I read that it does not. 
So why should I add GPS antenna to the gateway? What purpose does it have? Thanks!
 “I’m looking for a LoRaWAN Gateway in the AU915-928 ISM band that supports node geolocation through fine-timestamp. Does RAK7249 Bundle Pro - AU915 support it? - Hello, It does not support it, none of our Gateways do. Regards Vladislav” https://store.rakwireless.com/products/rak7249-diy-outdoor-gateway