Hi Mhaskett,
I suggest you to use Exchange ActiveSync to sync your calendar because if you will use POP or IMAP (with both the accounts your work email and Gmail) to connect your Email account it will sync only your Email not calendar and contact.
You may refer to the article below to get more information about supported connection type on mobile devices.
http://help.outlook.com/en-us/140/cc825479.aspx
Best Regards,
Pratik Pandya