Agreement of sale cum gpa with possession

On the basis of the GPA in your favor, if the  principal is alive then you  can execute a registered gift deed in favor of your child, provided there is a mention about the transfer to a third party through gift deed too in the POA deed.

You may make sure that the principal is alive.

@Querist- First Pay then seek advice.

Thank you.

Since you have purchased plot through Sale Agreements cum GPA and still plot has not been registered in your name and you are not registered owner of  plot so can not execute gift deed of said plot in favour of your son.