Gift Tax implications on Gift made to daughter?

We have a residential apartment registered in our name (me and my wife ) and wish to gift the same to our married daughter.

We shall, therefore, request you to let us know the tax implication our doing so will have both at our end and at the end of our daughter.

We shall also request you to guide us about the documents which would be required to be executed to gift the apartment.

My father made a gift deed to me. Can he make another gift deed of 40% of the same property?

We had a single floor house. My father planned to make first floor & made a gift deed to me. My brother is a lawyer & he drafted another gift deed & my father signed on it where it is written Ground Floor + 40% of First Floor + First Floor Roof Right.
My question is when my father already gifted the first floor then the same property can he gift again. If it all he does it without knowing , how to sort out the issue?