How do I forward my Gmail to another email account automatically?

• Log in to your GMail account.
• Click Settings (at the top)
• Click Forwarding and POP/IMAP (at the top of the Settings box)
• Enter the email address to which you'd like your Gmails forwarded.
• Click the drop-down menu (in the next line)
  Choose "keep Google Mail's copy in the inbox" or
  Choose "Archive GMail's copy" or
  Choose "Delete GMail's copy"
• Click Save Changes.
  

You also can set up filters to forward selected GMails
You can create upto 20 filters