Although there isn't a direct feature to create borders on Google Docs, there are 3 workarounds that you can use to create that appearance.

You can add a Border to an image in a Google Docs document. Creating and putting a broder is very easy if you follow this procedure.

Step 1: To add a page border, go to File, then go to Page Setup. Click on page margins and lower it. Then click on OK. Step 2: Go to insert, go to Table. Then select a Cell.

Google today updated Google Docs with some basic image-editing tools. You can now crop, rotate, and add borders to images in a document without leaving Google Docs.

Invisible Borders in a Google Docs Document or Slide Navigate to the body location where you want to insert the table. Click "Table" followed by "Insert Table." ...

With tables in Docs, you can insert an image in one cell and the caption in the cell beneath it. If you want to make a gallery, increase the columns and rows and add more images with captions.