Google Docs is a cloud based document editor. It was only supporting with desktop browsers. Google has launched a mobile browser version of the Google Docs editor, so now you can edit your documents on-the-go. No matter where you're.
It's pretty easy to do. Just visit docs.google.com in a browser on a supported device, and select the document you want to edit. Then, when you’re viewing it, press the Edit button to switch to the mobile editor.
In the next few days, They are rolling this out to English-language users around the world on Android with Froyo (version 2.2) and on iOS devices (version 3.0+) including the iPad. They will be adding support for other languages soon.