Motor Pool - Google Calendar add and email Invoice

Is there a way that the Motor Pool can forward the reservation to a Google Calendar. The header would be the vehicle number-reservation number. It would contain the start date/time, end date/time, customer / customer contact. Also, when printing the invoice for the customer, if there is a customer email address, can there be a feature to email instead of printing and mailing?

Imported from [WISH-101] Motor Pool - Google Calendar add and email Invoice

It would nice to have this communication both ways so reservation could be made in ether Google calendar or Motor pool and both show the reservation.