I have got the same problem with the TTN indoor gateway. But I think there is a workaround by searching the gateway id at TTN.
arjanvanb explained it here: Determine which gateway is used by a given node
So you put the gateway-id in the url and get all JSON data including the position. Example: https://www.thethingsnetwork.org/gateway-data/gateway/eui-0000024b080606d8
https://www.thethingsnetwork.org/gateway-data/gateway/YOUR-GATEWAY-ID