How do I transfer my Xbox one gaming data and purchases from one Microsoft account to...

How do I transfer my Xbox one gaming data and purchases from one Microsoft account to another Microsoft account

You cant. Nothing is transferrable between accounts

how do you transfer game data from an xbox one to another account

Hello IvanAnisimov,

Thank you for posting on the Xbox forums. We understand that you are interested in transferring content and purchases from one Microsoft account to another. Unfortunately, there is no way to transfer content or saved data from one account to another.
The best way to share content from one account to another is to utilize the home console sharing feature
on the Xbox One. We hope this helps!

If I have 2 xbox accounts on the same xbox, am I able to transfer game data from one account to another account. I want my GTA data on the other account.

No. Nothing is transferable between accounts.

Game Data and purchases cannot be transferred between Microsoft accounts. If you make a new account, it will let you make a new gamertag but your data/purchases will still only be on your old one.