ICS (calendar file) and gmail, How to make gmail display a meeting question?

Question

gmail

How to make gmail, using an ics file, display a question about joining a meeting in Google calendar?
It is clear that you need to use the vevent section in the ics file that you generate with the script, but in more detail? How to do it?
I get only such an ics file that can be imported into the calendar, but whatever is written inside the vevent, gmail does not offer to confirm the meeting.