No. Gums (and possibly even tongue) are also part of your "smile". Could have said "mouth" but smile sounds better.
On the note of tongues, using a tongue scraper is a great way to get rid of nasty bacteria that causes bad breath and spreads to the rest of the teeth/gums. Cheap and effective.
Gist is that tongue cleaning yields less bacteria (that's one major cause of bad breath), but they still recommend both brushing and tongue cleaning since the reduction of tongue bacteria didn't reduce plaque. I never claimed that it did though.
Tongue scrapers are cheap and awesome. It's amazing what kind of disgusting stuff you'll scrape off that thing. I'll nearly guarantee you better breath unless you have some serious other problems, like periodontitis.
On the note of tongues, using a tongue scraper is a great way to get rid of nasty bacteria that causes bad breath and spreads to the rest of the teeth/gums. Cheap and effective.