In her travels with the Doctor, Leela faces killer robots, murderous homunculi, the Rutan Host, and the Sontaran invasion of the Doctor's home planet of Gallifrey. It is during this final adventure, The Invasion of Time, that she met and fell in love with Andred, a native Gallifreyan, and decides to stay behind to be with him.

http://en.wikipedia.org/wiki/Leela_(Doctor_Who)

Sorry for the confusion. I meant that Leela had survived along with a group of surviving timelords on New Gallifrog sorry New Galliyfrey