And it will auto-switch on GPUcoin when they become minable ?
Yes, if you use it as a failover address. Use a vertminer configuration file or this string example:
./cgminer --scrypt -o stratum+tcp://GPUCOIN.POOL.COM:3333 -u Weblogin.Worker -p Worker password -o stratum+tcp://PANDA.POOL.COM:4444 -u Weblogin.Worker -p Worker password
That will mine at the Panda pool until the GPUcoin pool comes online.