You can now sign up for Google Play Services and Gboard betas on the Play Store
Play Store betas offer a simple way to get the newest features in your favorite apps as soon as possible. Google runs a few of them, and today it’s adding Play Services and Gboard to the list. Just a few clicks and you can be running the latest goodies (and maybe some bugs) early.Google bundles up a ton of features and services in Google Play Services, and the wait for new versions to roll out can sometimes be agonizing. That’s why Play Services is one of the most popular downloads on APK Mirror. If you want to join the beta, head to the testing link and confirm (make sure you’re signed into the right account first). Your devices will download an update to Play Services automatically, which currently means you’ll be boosted from v10.2 to v10.5. The exact version number will depend on your device.
Source: You can now sign up for Google Play Services and Gboard betas on the Play Store