Yes, you can. When you declare the alias, start the url with an underscore, for example: 'gm _https://mail.google.com'. This way when you input 'gm' a new tab will open with gmail. Con: if you declare the alias this way always will open on a new tab, and maybe you don't want that. I am looking for a way to do it "on the go" (for instance and following the former example, 'gm' open on the same tab, '_gm' open on a new tab) but right now I have no time to develop it.
Thank you for your review.