Free to play games not letting me play online without gold

Gold is required to play online. They have announced that they are removing that for free to play games, but that has not started yet.

If an account that has purchased Gold sets the console as their Home, any profiles on that console can access the Gold as well.

So does xbox live share to different accounts because my brother was playing Fortnite on my other account and I didn't pay for gold on that account

You need Gold to play online in games that are paid for, but free-to-play games like Fortnite can be played without Gold. Minecraft would need Gold since it's not a free-to-play game.

i want to know are you making xbox live gold free? and when will i be able to play free online games on xbox one?

No. They are not making Xbox Live Gold free. They are only make games that are "free to play" such as fortnite for example, not require you to have gold to play online.

Other games that are not "free to play" will still require a paid Xbox Live Gold subscription in order to play them online.

There is no date announced yet for when free to play games could be played online without gold.