When we say 'gaming,' we're not talking about the sort of people who create or play video games professionally (although don't rule out seeing that come up on this list, too!). 'Gaming' is a euphemistic term for the gambling and casino industry. As the received wisdom goes, the only people with big money in a casino are the ones who are working for the house. That's true of the people working behind the scenes there, too.
More often than not, you'll find a gaming manager in charge of the games on the casino floor. They'll likely have a degree in hospitality, and a background in sales doesn't hurt, either. Your job is to be an expert in whichever game you're overseeing, be able to persuade people to come and play and lose their money, and be aware enough to spot a cheat. It's just like being a professional gambler, but without any of the risks.