If the new Google password is not working and if you have Internet access, I suggest you download and install Screen Lock Bypass Pro from Google Play Store. It will bypass the lock screen and reset/remove your screen lock password, pattern or PIN number. Alternatively, in order to unlock the tablet, you will need to restore it to its factory condition. You can find the instructions in your tablet's manual. Basically, you will need to turn it off, to press Volume Up + Power buttons and to select Wipe Data/Factory Reset from the Recovery menu.