I think it's yaddle. She was seen in the meeting in the phantom menace where young anakin is talking to the Jedi council. She was never seen again... She could have moved to a different location after becoming the mother of gorgu. Another theory is that she was kicked out for having a child, but the child had extraordinary powers so he was trained. If that is true, then yaddle might be able to sense his presence from far away due to her affection from her son. She was the one who probably saved gorgu upon receiving information of order 66. If she is not his mother, she is still a remining Jedi, so she can still sense him. I strongly believe my conclusion and accept no other.