There are two options for your like gate.
- A simple overlay that pops up when fans enter your Fan Center, and they can either exit out of the overlay or "Like" the page to make the overlay go away. This will appear every time they enter Fan Center until they have Liked your page.
- A custom image that you create that says something like "Like our page to enter Fan Center". Fans do not have an option to exit out of this image gate, so they are required to "Like" your facebook page before seeing the app.