Gamification is essentially a Points and Achievements system where you can earn Badges and possibly enhanced user access.

It's been done a million times at this point, and not successfully done within social media (for the most part) since it will force a user response and be manipulated. There is no "earning" in social media.

However, Treehouse does a really nice job of it with their courses, as well as with their community forums. In fact, they mention interesting ways to apply it within a few of their design and development workshops.

The only advice I would give you is to focus on enhancing a product with it, and not basing a product on it. That product should always dictate a rewards system - and, only if it's a valuable addition.

Badges - look at Untapped - I'm always seeing people share badges of what they drank on FB. A lot of online training sites use badges as well.

Leaderboard - Mario completed Intro to React (for example)

Assign a points system to interaction and you can use that as well.