I would like to meet unattended minor granddaughter at gate as it is her first time flying alone. What is the procedure to get a pass to go to the gate?

Contact the airline she is flying with her flight information and they will be able to advise you on how to proceed.

The airline will give you the information for any process that is available.

You will need to contact the airline

You should contact the airline she is flying on to get a special terminal pass, which allows you to go through TSA and meet someone at the gate.

I don't think so you can go there