GSuite - Adding an Out of Office Reply to GMail

Open Gmail.

In the top right, click on the gear to get to Settings, select Settings in the drop down.

Scroll down to the "Vacation responder" section.

Select Vacation responder on.

Fill in the date range, subject, and message.

Under your message, check the box if you only want your contacts to see your vacation reply.

At the bottom of the page, click Save Changes.