Filemaker Go does not use Plugins. The plugins would work with Pro but the question is how to display the data in Go. Since you can open the file on both platforms you will need two layouts or three.
If the scripts and actions require a plugin, that layout won't work on Go and so the Go actions will be different.
A date is a date and will show the same in Pro or Go but your problem is how to get the data from iCal and that will have to be using Pro on your Mac and then opening the file in your Go Device with a layout designed however you like.
Check out displaying your dated events as a Report List, you may find this much more flexible than a calendar like layout since you can search, change layouts and report styles and so forth.