You can "Edit Google documents offline...when you don’t have an Internet connection."
But...what you need to be aware of...and what I had to experience to understand...is that this can only be done (when using the Microsoft Windows disk operating system) in the Google Chrome browser. I use a lot of different browsers, and was unable to have this feature available with them.
"...Any changes you've made while disconnected will sync with the online version in your Documents List when you regain your connection to the Internet.
"Offline editing is only available for Google documents. It’s not available yet for Google spreadsheets or presentations.
"If you lose your connection to the Internet while editing a Google document, you'll be informed at the top of the page that your network connection has been lost. Your edits will continue to be saved offline, so you can keep typing.
Note that: "...offline editing allows a document to be open in only a single tab at a time.
When offline, in the Google Chrome browser, go to "drive.google.com" and what is available will appear.
This is great!
I am now considering moving all, or most, of my information from Evernote to Google Docs because of this free offline feature. I love Evernote, and have always been thankful for it. But, I've not been happy with the offline options available for free accounts. Until recently, I believed I was unable to have a note available on my (Samsung Galaxy Player) Android device while offline. Evernote states:
"...When this user syncs their device, enough data to allow for this note to be found via search (title, text in the body...and other metadata) is downloaded to their device, but not the whole note. When this user selects the note in question from a list of notes, the rest of the note will be downloaded."
With Google Drive installed on my Android device, I am able to make files available offline. I find this very, very useful.
I am very interested in apps that allow for synchronization, accessing, and modifying of data offline. I continue to appreciate, and use, Palm personal digital assistants (PDAs). And will probably replace them with Android and Google Chrome OS devices...when I am able to get all of my data ported to them from the Palm Desktop.