Share this! Glossary GN By Liz Sommer · Published on November 28, 2018 SHARE THIS Follow Us: The Brief: GN is an abbreviation for "goodnight." DEEP DIVE GN is typically used in texting and instant messaging. Leave a Reply Cancel reply Your email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Next up: Who Is Knickers, The Really Big Cow?