To get started, make sure you have administrator access to G Suite.
Please also note that only paid accounts have access to resource calendars so a personal gmail account unfortunately won't do the trick.
Go to the administrator panel in Google and select "Apps" > "Google Apps" > "Calendar."
Under the Calendar menu, you’ll see a section for resources.
From there you can add or edit existing resource calendars in Google. When you add a new resource, you can specify the type. Use something general such as “meeting room/conference room.”
Now, when you book events in Google Calendar you will be able to invite rooms to your meetings, effectively booking them in the process. Rooms reserved at the time of creating an event won't show up in the list by default. This prevents double booking, which isn't fun for anyone.