Yes, if the policy's benefits for your spouse or children expire upon maturity, you must immediately repay to your GPF account the lesser of two amounts: either the total amount you originally took from your GPF for that policy, or the total amount received from the insurance company.
Source: GPF Rule 25
What happens if I retire or resign before the full amount is recovered?
What if I use the policy as collateral for a personal loan?
What if my alternative payments (like insurance premiums) exactly match or exceed my minimum GPF subscription?
What if my policy gives me a choice to take the bonus now or let it accumulate?
Can I get my GPF paid to my bank account outside India?
This answer is for informational purposes only and does not constitute legal advice. Always refer to the original rules and consult competent authorities for official interpretation.