Can different family members use same Xbox gold subscription?

Your son would need to set the console as his Home console in order to share his gold. https://support.xbox.com/en-US/games/game-setup/my-home-xbox

Or to make it easier:

When you add a family member to an Xbox LIVE Gold Family Pack, you have to add it to the same console as the primary account holder. However, after you add that family member to your Xbox LIVE Gold Family Pack, they can recover their account on a different
console and still remain a part of the Family Pack. AND The Xbox LIVE Gold Family Pack gives you four 12-month Gold memberships for less than the price of two.

Q: Everyone in my family is already an Xbox LIVE Gold member. Is there a limit to how long my Xbox LIVE Gold Family Pack subscription can be?

A: An Xbox LIVE Gold Family Pack subscription cannot exceed 36 months. If your family members have more than 72 months of Xbox LIVE Gold membership remaining combined when they are added to the Xbox LIVE Gold family pack, any remaining time on their subscriptions
in excess of the 72 months will be cancelled and you will not receive a refund for any time beyond 72 months.

-

Taken from the family pack FAQ.

-

www.xbox.com/.../FamilyPackFAQ

It shouldn't work that way. That's per the FAQ for the plan -
support.xbox.com/.../billing-points-family-pack

When you add a family member to an Xbox LIVE Gold Family Pack, you have to add it to the same console as the primary account holder. However, after you add that family member to your Xbox LIVE Gold Family Pack, they can recover their account on a different
console and still remain a part of the Family Pack.

Note The family member does have to remain in same country as the primary account holder.

Hey there AlteredPlanet, below I've posted the info from the FAQ for the family pack. The only "catch" I would consider being that the secondary members on the family pack can't purchase anything via credit card.

-

How much does a Gold Family Pack membership cost?

Xbox LIVE subscription costs vary by region. For current, specific information, see the
Xbox LIVE Membership page.

If you already have individual Gold memberships, the price is discounted based on how much time is remaining on your existing Gold memberships. For more information, please see

Join an Xbox LIVE Gold Family Pack .

Your Xbox LIVE account is billed for the first 12 months
(less any discounts you might be eligible for) when you sign up for a Gold Family Pack membership.

How do I sign up or convert an existing Xbox LIVE membership?

Please see
Join an Xbox LIVE Gold Family Pack.

How do I purchase Microsoft Points?

Microsoft Points are the currency of the Xbox LIVE stores. Only the primary Family Pack member can purchase points, making it easier for a parent to manage his or her family’s entertainment
budget.

Primary member: This is the Xbox LIVE account that you used to sign up for the Gold Family Pack membership. This account can purchase and give Microsoft Points to other family members (secondary accounts). See the section below,

How do I share points with family members (secondary accounts)?

Secondary members: Secondary family members cannot use credit or debit cards to purchase
Microsoft Points. Instead, secondary account members can

redeem a Microsoft Points card (available at retail locations), or the primary member can give points to secondary members (see section below).

How do I share points with family members (secondary accounts)?

The primary member on the Gold Family Pack membership can give Microsoft Points to other family members (secondary members), so that they can make purchases on Xbox LIVE.

Give points to family members

1. On your console, sign in to Xbox LIVE using the Family Pack primary account (the account used to sign up for the Family Pack membership).
   
2. Go to Settings, and then select Family.
   

[table][tr][td][/td][/tr][/table]

1. Select the member that you want to give points to.
   
2. Select Grant Allowance.
   
3. Follow the on-screen instructions to give Microsoft Points to the secondary member. Points that you give to a secondary member cannot be reversed later.
   

Note If you don’t have enough points in your account, you’ll be prompted to add more points before giving points to the secondary member.

Can secondary members use credit cards to purchase Xbox LIVE content?

No. Secondary members cannot add a credit or debit card to their Xbox LIVE account. Only the primary Family Pack member can purchase points, making it easier for a parent to manage their family’s entertainment budget.

Secondary members can
redeem Microsoft Points cards (available at retail locations), or the primary member can

give points to secondary members.

If a member has other Microsoft services, they can add a credit or debit card to use with that service. To view credit cards on a secondary account, sign into
Microsoft Billing and Account Management using the Microsoft account of the secondary account.

What is a primary and secondary Family Pack account?

The Xbox LIVE account used to purchase a Gold Family Pack membership is the primary Family Pack account. All other Xbox LIVE accounts associated with the Family Pack membership are secondary accounts.

To see and add family pack members:

1. On your console, sign in using the Xbox LIVE account that you used to sign up for a Family Pack membership (the primary account).
   
2. Go to Settings, and then select Family.
   

The primary and secondary accounts are shown. To add or remove family members, please see

Managing Gold Family Pack members.

How to I add or remove family members?

Please see
Manage Gold Family Pack members.

I’m getting a Gold Family Pack error. What should I do?

Please see
Troubleshooting Gold Family Pack errors.

How can I set parental controls?

Please see
Xbox 360 console parental controls.

How does a Gold Family Pack membership affect other subscriptions?

Secondary accounts on the Gold Family Pack don’t have a separate Xbox LIVE membership, but they can add other Microsoft services, to their Microsoft account and gamertag. Other service subscriptions are not shared among the Gold Family Pack members.

How do I cancel a Gold Family Pack membership?

For information about how to cancel your membership, see
Cancel your Xbox LIVE Gold Membership.