You can email a folder in Gmail by first zipping it on your computer and then attaching the ZIP file to the email.

When you "zip" a file, you'll compress its data and reduce how much space it takes up on your computer or phone.

If you don’t already have a ZIP file created, you can simply select all your files, right-click on them, and select Compress to > Zip file. However, if you want to add more files to an existing zip ...