The Sims 4 Gallery

The Gallery is a custom content browser feature, included in The Sims 4. It allows players to share Sims, families, rooms and buildings with other players, and allows players to instantly add other player creations directly into the game. The gallery is fully implemented into The Sims 4 and accessible from within the game.

Accessing the Gallery
In order to access the Gallery, you need to be logged into an Origin account. It doesn't matter which game mode you're in (main menu, Create-a-Sim, Manage Worlds, Live Mode, Build Mode) as to when you can access it, you only have to be logged in. From there, there's an icon on the top right of the screen that appears to have several picture frames within it. Click on that and it'll take you to the Gallery.

Navigating the Gallery
Clicking on the aforementioned icon will send you to the Gallery's Home page. Across the top of the screen, you will find several tabs, or an exit button when you're done. The tabs are as follows;
 * Home: This will allow you to see what's popular and what your friends have liked, as well as information on the weekly Create-a-Sim challenge and other relavent news
 * Community: This is where the bulk of the community's work will appear. It is not initially filtered by item type, but what has been favorited within the past week. Creations can be filtered by time, likes, etc. Individual creations can also be searched for, if you know what you're looking for
 * My Library: This is where all of your creations and downloads get put. From there, you can add them to your game.