In 2370, she befriended a malfunctioning Lieutenant Commander Data who had come to her planet to retrieve radioactive remains of a Federation probe that had fallen on the planet. He was suffering from amnesia when he arrived in her village and she gave him the name "Jayden." After falling ill from radiation poisoning, Gia, along with the rest of her town, were cured by Data's laborious efforts.
When a disguised Commander William T. Riker and Doctor Beverly Crusher came to town inquiring about Data's location, it was Gia who explained that he had been attacked and subsequently buried after his "death". (TNG: "Thine Own Self")