GPGS Login Screen

Hi all,
Can anyone explain if this login screen has been custom implemented or it is generated by gpgs login?
In my code, when I use
gpgs.login({ userInitiated=true, listener=gpgsLoginListener })

I see successful login message printed in the console. However, is that the only response we are supposed to expect? nothing else like login popup?

These are the screenshots I see in one of the game with google play services. Is this a custom implementation?



Anyone can clear my understanding?
This is my first ever try to implement gpgs plugin. Please let me know if I can provide any more info on this.