We don't really have a need to use them and there's no consumer demand of people saying 'we want beer with GMOs'. Sanitarium Sanitarium Has an Identity Preserved process in place for soy, which guarantees non-GMO seed is used and no mixing with GM material occurs in transport or manufacturing. Handful of minor ingredients, such as flavourings are of unknown status, because they are below the detection limits of available testing. Trying to establish their status. In favour of comprehensive labelling.
Consumers have the right to know the contents of foods and from where their foods are derived.
Traces of oils and some minor ingredients are of unknown GM status. Questions how comprehensive labelling could be enforced when testing for very low levels of GM ingredients is not foolproof. Testing can't give a definitive statement. And the suppliers themselves can't tell whether the product is GM or not. A supplier may use produce from a non-GM farm, that becomes contaminated during transport or manufacturing.