It doesn’t take long for us to get hold of Offline Gmail. If you didn’t notice, it is now available on Gmail Lab. Enable it, and your Gmail follows you even on the offline world.
Additional note after it has been enabled. You’ll see Offline link on the right top of your Gmail page.
Clicking on it will prompt you to install offline access for Gmail, and Google Gears if you don’t have it installed.
Follow the installation steps till the completion. Once completed, it will start downloading your emails immediately. It could take long time, depending on how much email you have.
Once all emails are downloaded, you’re now ready to go offline!!