"Ground system software" is the software that isn't part of the platform - the same verbiage is used for aerospace development. I've worked on bomber platforms that had test software written in Labview, and I'd say the same thing - "definitely not mission control or platform software".
The operator console software for the Distributed Common Ground System is written in Java. So is at least some of the operator console software aboard the P-8 Posiden. Both of those cover "mission control" for their respective systems.
