George (15) was a member of the New Zealand 4 x 100m relay team that won the gold medal in 49.44sec in the women's youth grade in Rarotonga.
She was second in the 100m in 12.28sec after qualifying in the heat in 12.44sec.
George also won a silver medal in the 200m in 25.26sec after qualifying first in her heat in 25.13sec.
Her third silver medal came as a member of the New Zealand 4 x 400m relay team in 4min 04.59sec.
Her coach, Brent Ward, said George had the potential to become a senior international and compete at the Commonwealth Games.
''I absolutely believe this,'' he said.
''She not only has the speed but also the determination.
''I'm adopting a conservative approach and am not loading Caitlyn up with senior-type training,'' he said. ''It's important that we get things right and develop her potential.
''There is room for improvement in her starts and acceleration but that will come when she gets more powerful.
''She is full of running, particularly in the 200m. It is great to see her come speeding off the bend in the 200m.
''She just has to get the self-belief and she will come through.''
There were 22 countries competing in Rarotonga and Ward believed it was a good test of her temperament.
''It was a good competition for her. She was stepping up to another level again by running personal-best times in winter. It was a great effort.''
George demonstrated her potential in Timaru in March when she beat the 100m record set by Southland's Jane Arnott at the South Island secondary schools championships more than 20 years ago. George's time was 12.37sec.
''Caitlyn is not only running fast personal-best times, but breaking good records as she goes.''
It has been a successful few months for George, who won bronze medals in the 100m and 200m at the New Zealand secondary schools athletics championships in Hamilton in December.
Her next target will be at the same championships in Wanganui in December.
