No, animal-free protein does not contain GMOs.
The microflora we work with are really good at producing different kinds of protein naturally. We simply give them instructions for producing exactly the type of protein we want—in this case, the milk proteins casein and whey. We then filter out the flora, leaving only pure protein. In other words, genetic engineering is part of our process, but genetically modified organisms or any detectable genetic material is not present in our protein.