Open Gmail
Click the gear icon
Select See all settings
Go to the Forwarding and POP/IMAP tab
Click Add a forwarding address
Enter the email address you want to forward to
Click Next
Click Proceed
Check the confirmation email sent to the forwarding address
Open the confirmation email
Click the verification link
Return to Gmail settings
Refresh the Forwarding and POP/IMAP tab
Select Forward a copy of incoming mail to
Choose the forwarding address
Choose what to do with Gmail’s copy
Click Save Changes