Rebecca Smith's best performance was in the marathon, held around the city streets.
She broke away from the pack at the 20km mark, with Wanganui teammate Nicole Travers.
The pair put a 500m gap on the field before Smith surged away from Travers to lap the field, eventually winning by over a kilometre.
Travers ultimately finished fourth behind Gibbs and Australian Grace Stevens.
Travers would have a string of fourth placings to help her team rack up the points and teamed with Smith and Gibbs to convincingly win the relay from Australia and the New Zealand No2 team.
Wanganui's Eden Smith contested the Junior Men's class (under 19) and the 15-year-old raced an outstanding 10km points event, claiming the bronze medal behind Germany's Alex Emele, who would win the overall title, and Manawatu's Shane Maihaere.
Smith also performed well in the marathon, won by Maihaere, claiming fifth place.
In the Cadet Girls' grade (under 15), Wanganui's Monique Cleeve battled hard with Timaru's Tyla Smith, but the reigning national champion proved too big a handful and won all her races to nail a clean sweep.
However, Cleeve pushed Smith hard in each event to come home with four silver medals, plus a gold for the winning relay team with Smith and Timaru's Jazmyn McCauley.
Cleeve was especially strong in the 21km half marathon, finishing second to Smith by only a wheel in their sprint finish.
Wanganui's other Cadet Girl in Eugenia Lee was on debut and found the pace over the longer distances a challenge but still gained a bronze medal in the relay.