My grandson is flying in tomorrow. He is a minor and traveling alone. What are the rules about a minor traveling alone? Can I go down to his arrival gate to meet him?

Yes

Get a pass that will allow you to get into the airport to the gate get in touch with the airline hes traveling with

Go to the ticket counter for the airline and you can get a pass that will allow you to see your grandson all the way to the plane. You will need to go through security, same as any passenger though. So keep that in mind.

Yes off-course you will need to go to the airport and get in touch the airline company to let them know you will be waiting for him.