Custom Date Ranges on Gantt Charts

The vast majority of our Marketing projects have event dates (e.g. The date the promotion or flyer is live for customers).

Our management and executive would love to see a Gantt chart report that shows all upcoming project event dates.

I have custom form data for this, but there's currently no way (that I know of) to show a Gantt chart with these date ranges.

It would be fantastic, if an admin could add custom form date range fields to the list of available things a user can toggle on a Project or Task Gantt chart. This would give managers a way to quickly see the event dates along with the project production schedule.