When you’re accessing your Google Calendar on your iPad or other iOS device, you basically have three main options. Each has pros & cons.
1. Use the Mail & Calendar apps that comes from Apple
This requires you to turn on Mail or Calendar syncing under Settings…Mail, Contacts, and Calendars. You then use the native iOS apps that come preinstalled. The con to this is that your interface will be completely different from other Google Apps web-based experiences. One major plus, however, is that you can access email and calendar information when you are away from a WiFi connection or Cellular Data. Also, users have noticed that calendar changes can take around 15 minutes or so to be reflected on the web.
2. Use Safari or other browser and view the mobile version of your calendar/email
Google detects that you are on a mobile device and presents a streamlined version of your email or calendar. Some features are removed or are limited to make the mobile experience easier. To go this route, typically you just log in to your web-based Google Apps just like you would on a desktop computer, however your browser is detected to be mobile and you are redirected to the mobile site. The mobile site uses less data (WiFi or Cellular) and therefore should be fairly fast. However, you can not access this version unless you have a data connection of some kind.
3. Use Safari or other browser and view the desktop version of your calendar/email
In the mobile version of Google Apps email and calendars, you should see a link that says “Desktop” at the bottom of the page. Switching to this view should present a version of your email or calendar that looks very similar to the version on your desktop. However, since mobile browsers are limited, some features may not appear or work correctly. However, it’s nice to have the option!