I just did this a bit ago, using these instructions (which worked great for me, BTW):
You can use iTunes to upload existing Contacts from your Apple device to Gmail. Only the following information can be uploaded:
* People's names and job titles
* Company names
* Email and postal addresses
* Phone numbers
* IM names, including the type of service
* Notes
Other information, like custom ringtones and photos, are not uploaded. Please sync them to Outlook first.
Upload Instructions
1. Connect your iPad to your computer using the USB cable.
2. Open the iTunes application.
3. Select your iPad and click the Info tab.
4. Check the Sync Contacts with option and select Google Contacts from the drop-down menu.
5. Click Configure and enter your Google username and password.
6. Press Apply to sync your device with iTunes.
7. Once you've checked that your contacts are available on the web, disable iTunes Contacts sync with Google. If you don't do this, you'll see duplicate contacts on your iPad
Hope this helps you too. Good luck.
Marilyn