Columns

You can have multiple columns of content placed on your Gutenbrg article.

1. To start, click on the Add Block Button
 

2.  In the Add Block Panel, search for "columns" if its not readily available for you. Click on the Columns icon to select it
 

3.   You can then select from a pre-defined column layout
 

3.5 You can also press "skip" in this same window and customize your own layouts. You'll be given an option to add more columns as you see fit.

And then on the Right side, you can specify the width for each column:

4. Once you make a selection, you can start placing other content blocks in each column :