TRY THIS
LOG IN GMAIL ACCOUNT > click ACCOUNT SETTINGS> in personal settings there is AUTHORIZING APPLICATION & SITES select>enter your gmail PASSWORD>In that name text box enter your name and click GENERATE PASSWORD>then enter that password in your andriod phone and login.
LOG IN GMAIL ACCOUNT > click ACCOUNT SETTINGS> in personal settings there is AUTHORIZING APPLICATION & SITES select>enter your gmail PASSWORD>In that name text box enter your name and click GENERATE PASSWORD>then enter that password in your andriod phone and login.