Hi Tanveer,
Thanks for using Syncfusion products.
At present there is no support to filter the absolute value in GridDataControl. So that we have created a sample by using custom filtering to achieve your requirement .
Please check the sample in the following location.
Sample:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=Sample-465076041.zipVideo:
http://www.syncfusion.com/uploads/redirect.aspx?&team=support&file=samplevideo-1112881993.zipPlease let us know if this helps.
Thanks,
Manikandan