This Applet watches your "Reminders" list in your native iPhone Reminders app for new items you add. It will pick up those items and create a new event in GCal for you!
If
New reminder added to list
This Trigger fires every time a new reminder is added to the list you specify.
Then
Quick add event
This Action will add an event to your Google Calendar. Simply include a detailed description of when and what.
Discover more time saving integrations for Google Calendar and iOS Reminders