When users encounter with the issue of Gmail forwarding not working then start by launching Google Chrome on computer and then proceed to Gmail.com. From upper-right corner of the Gmail window, tap on gear icon and choose see all settings. Now, choose forwarding and IMAP/POP tab at the top of the page. Lastly, choose to add a forwarding address in the forwarding section. These are the steps that users need to follow to resolve Gmail forwarding not working issue.