Pinot family identity
Plantgrape describes Pinot gris as the grey mutation of Pinot noir, noting that white-berried variations on the same vine are fairly common. UC Davis FPS independently lists France as its country of origin and Pinot grigio as its TTB-approved alternative name.
Terroir and frost context
Plantgrape describes Pinot gris as rather vigorous but not very productive, well adapted to northern regions and rather deep, relatively dry, well-exposed limestone terroirs, little sensitive to winter cold and productive after spring frost. These are attributed observations, not a site prescription.