To help you keep your Gmail account secure, Gmail lists recent sessions at the bottom of your inbox. There you can view recent account activity, and also see if your Gmail account is still logged in another session. If you do see another open session (maybe its simply your laptop?) there is a link to log out of the remote session.
Cite This Page
Feldman, Barbara. "How to Keep Your Gmail Account Secure." Surfnetkids. Feldman Publishing. 12 Jul. 2011. Web. 29 Nov. 2014. <http://www.surfnetkids.com/tech/803/how-to-keep-your-gmail-account-secure/ >.