If you already have a GAN model, then you can use it in Create ML Components using an adaptor.

Create ML Components does not offer out-of-box support for any specific GAN model, but you are able to make a transformer to use a GAN under the hood.

If you don't already have a model, I’d suggest starting from checking these models (where they are published) that you are interested, see if they can be converted to MLModels, if you want to perform inference (deploy) on Apple hardware. Create ML or Create ML Components do not offer out-of-box support for such models, it meant to give you the flexibility to do so.