Trelise Howard, 9, also won pennants with a first in the 60m, second in the 100m, 200m and long jump and third in the discus.
Nikita Harding, 8, placed second in the long jump for her age group with many of the rest of the squad making finals in their events.
Lake City Athletic Club co-manager Rebecca Howard was delighted to see daughters Gisele and Trelise perform well but stressed the excellence from the whole team.
"I am so proud of them all. We may have had a small team but we represented Rotorua very well and it's important to remember a lot of the athletes they were competing against have professional input," she said.
"It's very difficult to get any sort of placings at these games because of how competitive it is and it gets harder as the athletes get older in their competitions.
"It's really amazing Gisele won a silver and she was just 1cm off the winner and Trelise really came through. But everyone had wonderful performances and we had a great team spirit."
Howard said the Colgate Games were like a "kids' Olympics".
"The officials were trained - it was a very professional event done very well. And the main motto for competitors was to respect the officials and respect other athletes.
"We are definitely hoping to go next year and see similar success. After this year all the athletes can take a lot of confidence from this and aim to do the best they can in the future. They are all superstars in my eyes."
All the 2017 Colgate Games results here:
2017 Colgate Games Lake City Athletic Squad:
Hannah Gapes, 13, Gisele Howard, 12, Lillian Muir, 11, Trelise Howard, 9, Nikita Harding, 8 and Cooper Simes, 9.
Day 1:
Gisele Howard, 12, silver medal - long jump (PB)
Trelise Howard, 9, 2nd place pennant - 200m
Lillian Muir, 11, 16th place 200m (PB) / 8th place - high jump
Nikita Harding, 8, 2nd place pennant - long jump
Cooper Simes, 9, Finalist - shot put
Day 2:
Gisele Howard, 12, 10th place - 1500m / 16th place - discus
Trelise Howard, 9, 2nd place - long jump/ 2nd place - 100m
Nikita Harding, 8, - Finalist ribbons - discus and 100m
Cooper Simes, 9, 1st place pennant- long jump / 1st place pennant 200m
Lillian Muir, 11, 17th place
Hannah Gapes, 13, 6th place - 1500m
Day Three:
Gisele Howard, 12, 10th place - 800m
Trelise Howard, 9, 1st place pennant - 60m/ 3rd place pennant - discus
Lillian Muir, 11, 7th place - long jump (PB)
Nikita Harding, 8, Finalist ribbon for 60m
Cooper Simes, 9, 1st place pennant-100m / finalist ribbon for discus
Hannah Gapes, 13, 6th place 800m