Its fake.
Trying to find out why you got this, the reason could be someone you know or most probably who knows you want to have a look in your mails box your sent mails and received mails. So is asking you for your email and password indirectly.
So now its time for you to figure out who it could be. Also recently have u been asked by google to enter captcha code to log in to your mail box. If yes then its an alarm for you.