Hi Adrien,
Thanks for using Syncfusion Products.
Yes. GroupBarItem control exist in the version 8.2.0.18. Here is the UG link which illustrates you how to create a GroupBar control and add GroupBar Items to the control
http://help.syncfusion.com/ug_82/WindowsFormsUI_Tools/CreatingGroupBarAndGroupViewItemsProgrammatically.htmlPlease let me know if you need further assistance on this.
Thanks,
Karikalan N