father in law is retaire on 31dec. i want 2 give a gift 2 him, what i give ? my email [e-mail]?

Answer 1

That is a nice gesture.

When many people retire, they tend to need things to keep them busy. I would think along the lines of a gift related to hobbies.
Not knowing your father-in-law, I don't know what hobby might fit him. (ie.. golfing, fishing, model building, hunting, ...etc).