It's very unlikely at the moment, Steven Moffat will be wanting to establish his own companions instead of bringing back old ones.
No Jack is not in series 5.
No.
Gallifrey probably won't come back anytime soon since it was destroyed in the Time War...
Martha comes back in series six as a flash back. Donna, Rose come to but it is not enought so he chose amy as a child!!
Gallifrey
Yes but only with the Doctor Who Series 4 Boxset
Series 7 (2012)The next series begins in Autumn 2012. Many of the episodes are still in production.In series 7 there will be 13 episodes and a Christmas special.
now
Maybe The Robots will might come back in series 5 or 6 i don't know wait and see.
It is said to come out in approximately spring in England
Doctor who will come back at Christmas and new years. David Tennent changes to Matt smith.
they are out.