In the European Union, gum arabic appears on ingredient lists either by name or as E414, its designated additive number in the thickeners and stabilizers range. In the United States, labels typically use the terms "gum arabic," "acacia gum," or "gum acacia," since the E-number system is a European convention.
A newer labeling angle: gum arabic is increasingly sold and declared as "acacia fiber" or "soluble acacia fiber," particularly in fiber-fortified foods, protein bars, and supplement powders. The substance is the same. The name change advertises its soluble dietary fiber content and leaves its stabilizing function unmentioned.
All of these names refer to a plant-derived ingredient, so none of them signals an animal-derived component. Vegans reading labels do not need to investigate further when any of these terms appears. The only practical concern is confusing it with animal-derived ingredients such as gelatin. Gelatin appears separately by name on ingredient lists.