As well as the chart-topping Craggy Range, other local vineyards in the country's top 10 were Esk Valley, Te Mata Estate, Sacred Hill, Bilancia, Vidal and Matua.
Mr Campbell was glowing in his praise for the small but specialised wine-growing region.
"Five of my 10 top choices here are from Gimblett Gravels, including three of my first four picks."
The team at Craggy Range said they would be celebrating their latest accolade by offering an exclusive tasting of their Le Sol range and other syrahs at the Cellar Door at Giants Winery this weekend.