Hi Rohit,
Thanks for your interest in Syncfusion Products.
In GridGroupingControl, freezing of rows cannot be supported due to the functionalities like grouping, sorting, etc., handled in it.
We hope you have been able to get help with your technical support inquiry in this Forum. In addition to our Community Forums, we have other customized support avenues like our Direct Trac Developer Support System
https://www.syncfusion.com/account/login?ReturnUrl=%2fsupport%2fdirecttrac%2fincidents and we hope you will take advantage of this system as well.
Thank you for your participation in Syncfusion’s Community Forums.
Regards,
Rajadurai