Special Plant Zundert bred the white-berried plant, which is managed by Plantipp.
The KVBC judging report said the plant was "unique and innovating".
Gaulthier Pearl has edible pearly white berries and can be grown indoors or out.
Another three varieties represented by Plantipp were awarded at GrootGroenPlus.
A gold medal was given to Microbiota decussata 'Lucas', bred by Lucassen. The jury said: "The plant shape of 'Lucas' is distinguishable and innovative, as well as its more upright growth habit compared to other M. decussata." The jury was also impressed by the fine structured foliage and soft green colour of the plant.
Loropetalum chinense Ruby Runner ('2010.009'), bred by PDSI, won a silver medal. The jury said: "Very deep foliage colours, combined with good warm flower colours."
Breeder Maarten Bloemen received a silver medal for Vaccinium vitis-idea Fireballs ('Lirome'). "More vigorous and tougher than other varieties." says the judging report. The jury added: "The edible fruits are an extra value to this plant."