It has been a long road to recovery, which included four weeks confined to a hospital bed, before returning to Hastings with father Richard, Ms Gillies' youngest son.
"She came back here [to Hastings] for all her check-ups, it took a little while to get her used to walking again and more time for all the sores to heal," Ms Gillies said. "Her leg was swollen and it was a while before she was back to normal."
That terrible worrying time is now a distant memory as Georgia prepares to celebrate her fifth birthday in Australia on March 7.
Soon it will be time for her to move from daycare to a school in the town of Alice Springs, where she relocated with her maternal grandmother about a year ago.
"She is doing really well for herself, she's very good with her speaking, there's been no problems. She's a cheeky little girl, she's just lovely and we miss her very much. We're happy she's okay," Ms Gillies said.
It had been a shock to the system seeing her granddaughter badly injured but instinct led Ms Gillies to make the right decision by rushing her to a medical professional.
Not only was it a taxing experience for Georgia herself, but the entire family who were all deeply affected emotionally.
"It was quite drastic really, she was in such a lot of pain and they had to put a lot of tubes in, it was quite sad because I had never been through that situation before.
"She got over it, but that's not the point you always look back and wonder."
Ms Gillies said the courier driver was never charged but helped the family travel to Starship and dropped off a swingset for Georgia as a gesture of goodwill.
According to Housing New Zealand, 334 Hawke's Bay properties have had work completed on their driveways as part of its $30 million safety programme.
The programme began in November 2013, aimed at reducing the risk of children being run over by creating fenced off play areas for children, separate from driveways.
Another 78 Hawke's Bay homes will have improvements made in the next few months.
Housing New Zealand regional manager Darren Toy said the priority was to make safety improvements at properties where there were children aged 5 and under, as toddlers were at the greatest risk of being injured in a driveway accident.
The improvements ranged from installing fencing, self-closing gates with child-resistant latches, speed restriction signs, speed humps and convex mirrors where appropriate.
According to Safekids, New Zealand has one of the highest recorded incidences of child driveway death and injury in the world, with another child hospitalised every two weeks and five children dying on average each year from driveway injuries.
- Additional reporting NZME.