When you connect to GS from GLS via router or LANC2, you need to set the gateway route for GLS's virtual IP address for the router or LANC2. Also, you need to set the router to broadcast the route for GS's virtual IP with RIPv1 to the server that uses GLS.
Confirmation method
Check the settings of the static route for the router and RIP broadcasts.
Since RIP is processed within GLS, it is not necessary to run the daemon (quagga(ripd)) which obtains RIP in the server.