Everything displayed on the Gantt chart when used with MindManager is stored within your MindManager files...so if you pass your MindManager file to anyone in the world who also has JCVGantt...they can see the Gantt, edit it and send it back to you.

If you pass it to a friend who only has MindManager...any edits they do will NOT corrupt your mindmaps, in fact they may still edit the task information and send it back to you.