There is some IPv6 support.
The GR access points support IPv6 bridging - when a network/SSID is configured in bridge mode IPv6 traffic will be passed. This will not work if in NAT mode.
The GS series switches can pass IPv6 traffic, but require IPv4 for management traffic.
The GX security gateway does not currently support IPv6 routing.
Hope this helps @Camfj141
Edit: DFS is supported. The GR access points should be able to operate on DFS channels and adhere to the restrictions associated with them. If you have any problems configuring them as such, please open a support case in the app.