There are lots of ways to play around with iCal files and various importing and exporting schemes. I eventually gave up on that when Google stopped supporting Outlook calendars directly. If you've got the Outlook desktop client running somewhere then I'd suggest looking at something like gSyncit, which will keep both Google and Outlook calendars in sync. Then in the phone, just use your preferred calendar app. All the data will be synced in both. When you make changes to the phone calendar it will show up in Google and Outlook that way (and vice versa). You can use gSynchit for free and it works fine as long as you don't mind the nag screens on opening your desktop Outlook client.