I don't think you'll have much luck getting AMOS software to use a CGX screen. I'm sure some sort of hack may be possible, but it would be a bit of a nightmare to code.
The closest you might get is someone writing an AMOS extension to allow CGX screens to be used - but that wouldn't help with existing AMOS software.
Is there any particular AMOS software that you're looking to run nuder CGX? Or is it AMOS Pro, the editor itself you'd like to use?