Using google calendar, create a calendar entry. Invite members by email. Assuming you know the email of all members who RSVP for meetup. Use the message function in meetup.com to ask for email if you don't know someone who has RSVP.
In the calendar invite, for the conference location specify hangouts. You do not need GSuite for this currently. For the location specify "online".
Voila! You have a scheduled an online meeting.