To do this on the iPad, open Settings > Mail, Contacts, Calendars and tap on Add Account…, then select Other and choose Add CalDAV Account from the list of choices under the Calendars list.

Next, enter www.google.com as the Server, and use your Google Account Information for the User Name and Password fields. At this point if you exit Settings and open the Calendar, you will find that only one calendar is accessible: your default Google Calendar.

If you have multiple Calendars set up in Google Calendars, there is one last step you need to perform. All the how-to’s I found indicated that you need to use your desktop browser in “developer mode” to act as an iPhone Safari Browser by changing the user-agent setting as well as disabling JavaScript. I found that this course of action no longer works. Something must have changed on Google’s side. Instead, I simply navigate to www.google.com/calendar/iphoneselect from the Safari Browser on my iPad. From here I can see all of my Google Calendars and I can select which ones to sync with my iPad.

Now, when I open the native Calendar App on iPad, I can see all of my Google Calendars. I’ve added entries, and they’ve all synced nicely. In our household, we have a master Family Calendar on the iPad that everyone can update from a central place. We then subscribe to each published calendar from our personal devices. For family occasions, school events and other shared activities, this is a convenient way to share information with the whole family and still have one central point of control that all can access and update.

source : http://gigaom.com/apple/ipad-quick-tip-ena...ogle-calendars/

It’s even easier on the iPad. No faffing around with commas, and no need to create the account first and go back and edit it. Instead, it works like this:

Open the Settings app: settings
Tap ‘Mail, Contacts, Calendars’: mail-contacts-calendars
Tap ‘Add Account…’: add-account
Tap ‘Other’ (NOT Gmail or Google Mail): Other
Tap ‘Add Mail Account’: add-mail-account
Enter your full name in the Name field (this is what people will see in the “From” field when you send email), your Gmail address in the Address field, your password in the Password field, and the word ‘Gmail’ in the Description. Then tap Save. new-account
You should be presented with the ‘Enter Your Account Information’ screen.
Scroll down to ‘Incoming Mail Server’, and use ‘imap.gmail.com’ for the Host Name, your full Gmail address for the User Name, and your Gmail password for the Password. account-info
Under ‘Outgoing Mail Server’, use ‘smtp.gmail.com’ for the Host Name, your full Gmail address for the User Name, and your Gmail password for the Password.
Tap the ‘Address’ field once to place the cursor at the end of your Gmail address: address
Now, start typing one of your secondary email addresses that you’d like to be able to send email from, each separated by a comma. To type a comma on the iPad when you’re in an email field like this, first tap the ‘.?123’ key followed by the ‘#+=’ key. The comma will appear in the top right of the keyboard, to the left of the backspace key.
Repeat iPad steps 10 and 11 for as many email addresses as you like. You should end up with a list of email addresses, separated by commas. The field should end with a ‘.com’ or ‘.co.uk’ or some other domain, not with a comma.
Tap ‘Save’.
Tap your iPad’s Home button to get back to your Springboard.
To check it’s worked, open Mail, browse to your Gmail account, and create a new message.
Tap the “Cc/Bcc, From:” field to open it up, then tap the “From:” field. You should see a picker overlay containing all of the email addresses you just entered. If not, don’t panic — just power down your iPad by pressing and holding the power button, and it should be there when you next power up and use Mail. from-addresses

Final notes

Note that recipients will still be able to see your original Gmail address when you send from your secondary addresses by looking at their email header information (just like Gmail in your web browser). This shouldn’t be a concern for most, but if it is, you need to set up completely separate mailboxes instead of forwarding all of your addresses to one account.

source : http://modernerd.com/post/535350679/solved...d-multiple-from