Not vegan

gruyère is classified as animal-derived by the local ingredient taxonomy.

Names you may see on a label

gruyere그뤼예르gruyerГрюйерGreyerzerГрюєрGruvieraGruyere cheeseGruyere cheese from cow's milk

How to verify it

If this ingredient appears in the recipe rather than a precautionary trace statement, the product is not vegan.