How do u get family golden membership??

I believe that you can also do it in person. When you pay for parking and take in the stub you get that back while signing up.

Go on website and follow instructions for membership

You can purchase memberships online or inside the gate.

Online or in person

If I recall right, there is no family gold. You have gold passes and you have family passes. We purchased 13 gold passes and just renew them every year.