Sorry,Gate Keepers 4 is not avaiable yet. We will update Gate Keepers as soon as it is released.
If you want to read new chapter of Gate Keepers at the first time,you can subscribe it. We’ll send your the email as soon as Gate Keepers 4 updates.

Have more fun on facebook:

https://www.facebook.com/mangahomelife/

Or enjoy fantasy shoujo moments on tumblr:

https://onlyshoujo.tumblr.com/

You can read some other great manga to kill time