In GanttPRO, you can also work with project portfolios, that are a group of several projects displayed in one place.
This feature lets you have top-level simultaneous control over selected projects in real time, follow their progress and updates, as well as have quick access to the details of individual projects.
Check how to:
Note that portfolio view is only available for Business and Enterprise plans. Within these plans, an Account Owner, Account Admins and Enterprise users with a Custom role and a corresponding permission can create a project portfolio.