According to the information that we have, the upper limit for the solo skydive is 55 years old. If he is over 55, I believe the supplier is highly unlikely to accept the jump. If he is between 50 and 55 then it might be possible but doctors permission would be an absolute necessity and even then that is not a guarantee, and would be at the suppliers discretion. So I would be unable to offer you any assurances that he would definitely be able to dive.
I would advise however that should you proceed with this as a gift and he was unfortunately deemed ineligible, he would be able to exchange his experience for any other on our website using the cash value, including perhaps a more suitable tandem skydive or other extreme/flying experiences.