How do I set up gold to work across two consoles in same household

You have to go to settings and make the account you would like to use without signing in with as home xbox in my preferences , you can then play there games without your profile having to purchase the item

Just add the account on the other console and set up with Home Xbox

Here is a great guide on how to Gameshare

https://www.digitaltrends.com/gaming/how-to-gameshare-on-xbox-one/

Set as Home the console you are using less or is used by another user... When you are signed on, you have your gold privilege on any console, your home console give gold privilege to any account using it, ok?

If you are using the same account on both consoles, then there is nothing you need to do, as long as the account has gold. If however you want to share your gold subscription with someone else, then log in on that persons xbox, and make it the home xbox.
Then that person can use your subscriptions and any digitally downloaded games you have as well. More info on the home xbox setting can be found here https://support.xbox.com/en-US/games/game-setup/my-home-xbox