someone tried to hack my gmail?

[DunbarPappy®ϟϟ]

This is not indicative of a straight assault on your system, but more a leveraged probe into your Internet accounts.
These things are possible because of various leaks of information about yourself either you or others have made.
Some jerkweed somewhere has put these bits and pieces together, and surmised some sites or services are being used by you, and they are poking at the more common ones to see what can be milked or accessed.
(Could be a close associate or acquaintance???).
"Spear phishing" and social engineering can not be ruled out.

Sidebar:
Mail accounts are useful to crooks because they are often 'anchored' to a single account or mail addy.
That in turn can be leveraged to further advance probes into your other accounts.

(How a well-known technology writer Mat Honan had his accounts hacked: http://www.grc.com/sn/sn-364.htm
Use wordfind (ctrl + F) with this " In the space of one hour " to jump to the related discussion)

Article on how to set up a multi-account consolidating strategy.
Email for every Service – Stop using the same email for everything!
http://www.jd7.org/2012/08/10/email-for-...verything/