Sorry I don't get your question.
Let me rephrase my response. Let's divide the property into two parts. Part A ( gift) and Part B (Sale).
For part A, you will execute a gift deed and you will have to register the gift deed and pay stamp duty on 5 lacs of stamp value.
For part B, you will execute sale deed and need to pay stamp duty on sale consideration or stamp duty value of 5 lacs, whichever is higher.
I hope that clarifies your doubts.
In case, something is not clear, request you to take phone consultation.