Gboard for Android got support for stickers back in August along with several new features including Bitmoji, but it required you to install sticker packs from Play Store or install Allo app. Now Google has add four default sticker packs to Gboard by default so that you can use them just from the sticker options.
Stickers will show up on the bottom of the keyboard as an icon. Similar to GIFs, you can search for stickers as they appear in a carousel. When you share an animated sticker, it will show up as GIFs.
Google has also added support for 40 new languages, including Japanese bringing the total number of languages supported by the keyboard to 120. The latest update also brings bug fixes and performance improvements.
Google had replaced Google Keyboard with Gboard for Android in December last year since then the app has been getting a lot of new features. New features are available with Gboard v184.108.40.206732024 from Google Play."Gboard for Android gets built-in stickers, 40 new languages and more",