Hi Sanjay,
Thank you for your interest in Syncfusion products.
Border around any section can be achieved using PdfPageTemplateElement class. This has been explained in the sample given below.
After completing PdfGrid, you could make use of PdfGridLayoutResult to get the resultant page and bounds. Please check the sample in the link below that explains it as well.
F101845-1892214978.zipPlease try this and let me know if you have any questions.
Regards,
Geetha