Adding an additional xbox one to an existing gold account so there are two linked to it

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

You can still access your gold on your console as long as You're signed into Live. However, if there are any other accounts in your family that are using your console, they will no longer have access to your gold.

Yes, it's possible:



Q: Can I add existing Xbox LIVE Gold members to my Family Pack? For example, my kids are already Xbox LIVE Gold members.

A: Yes. When an existing Xbox LIVE Gold member is added to a Family Pack, the remaining time on their Gold membership benefits the whole family! For every two months remaining on their current Gold membership, the entire family receives an extra month of
Xbox LIVE Gold. For example, if your child has six months remaining on their existing Xbox LIVE Gold membership, when you add him/her to your Family Pack, all four of the individual Xbox LIVE Gold accounts available in your Family Pack will be extended by
an additional three months. If you have two children who have four and six months of Gold remaining, respectively, on their existing Xbox LIVE Gold subscriptions, all four of the individual Xbox LIVE Gold accounts available in your Family Pack will be extended
by an additional five months.



You can find more information here -
www.xbox.com/.../FamilyPackFAQ

The free month of Xbox Live gold can be redeemed during the account creation process and cannot be added to an existing membership.

LINK

Web translation:

Account with gold status for two consoles

I have an xbox 360 console, I plan to buy an xbox one s console, while continuing to use the xbox 360. Can I use an existing account on these two consoles?
Is it possible to use one gold status equally on two consoles?

Response:

Hi there,

a gold subscription is linked to the Xbox Live Account, which means that if you use the same Xbox Live Account on the Xbox One console then the gold subscription etc will be available, same for any other digitally owned games (that are supported
on the Xbox One)

Also for a little more info on the prize. Nowhere does it stipulate that you cannot use the One Month Code with an existing Microsoft Account Which already has Gold. When looking at the xbox.com/usagerules , No where does it state that a "Xbox LIVE Prepaid
1 month Gold Membership Card." cannot be added to an existing gold account.