Generally, MQ is MQ, regardless of the platform on which it's running. Therefore, we can virtualise queue responses that are in MQ on the AS/400.
The main thing to watch out for is queue security, if it's enabled. Being an IBM system, there's a chance that an IBM-specific cipher suite is being used. If this is the case, it'll either need to be changed to a cipher suite that's supported by all JDKs, or the whole of DevTest will need to be attached to an IBM JDK (which isn't downloadable from IBM for Windows, so it becomes a pain to implement).