Hi Foulont,
Thank you for contacting Syncfusion support.
Currently in Gantt there is no support to search the parent records. We have already logged a feature report “Support for search the parent records in Gantt” regarding this. As we are working on many high prioritized features in Gantt, we are unable provide a definite timeline in providing this support in Gantt. This feature will be implemented and included in any of our upcoming main release.
Please let us know if you require any other assistance.
Regards,
John R