I want to replace the group panel with a gridview.(like the left part of the gantt view).

Is the any ways to customize this?

Hello, Yongen,

RadScheduler is not designed to display the resources in a grid. It uses a SchedulerResourceHeaderCellElement to display the resource's name/image. In this case I can suggest you two approaches:

1. Add a RadGridView next to the RadScheduler control and populate the grid with the desired data. However, the tricky part here would be aligning the grid's resources with the scheduler's resources which may not be so easy as it looks.

2. You can create a custom SchedulerResourceHeaderCellElement and add any inner elements that you need in the cell. Then, using a custom SchedulerElementProvider you will need to replace the default SchedulerResourceHeaderCellElement with your custom one. The following help article demonstrates how to create a custom element that RadScheduler uses and replace it in the element provider:
https://docs.telerik.com/devtools/winforms/controls/scheduler/fundamentals/scheduler-element-provider- 

Feel free to use this approach which suits your custom requirements best.

I hope this information helps. If you need any further assistance please don't hesitate to contact me. 

Regards,
Dess | Tech Support Engineer, Sr.
Progress Telerik