The Trading Hub in Grand Piece Online is a core area where you can trade items with other players. It was introduced in Roblox's GPO in update 3.5, replacing Trading Island.
[GPO] Phoeyu spawned a fruit on me in Trade Hub…
So if you’re a returning GPO player wondering where Trading Island went, it’s been replaced by the Trading Hub. If you’re a new player, don’t worry: it’s pretty easy to access and use the Trading Hub.
Here's how to find and use the Trading Hub in Grand Piece Online.
To enter the Trading Hub in Grand Piece Online, you can either join directly through the Universal Hub or, if you have a friend in the Trading Hub, you can enter the code “!join (your friend’s username)” and you will be teleported to their location.