The confusion arises from the gambling industry's PR machine.
"Gaming" in the context of this thread I interpret as building virtual worlds and building empires in competition with other players to establish a winner based on points, funny money, or other virtual rewards. Or fighting virtual wars or seeking virtual treasures in competition with other human players or the games' AI.
"Gaming" is the gambling industry's name for what they promote, where "players" can lose real money, real careers, real families, real homes and even real lives through gambling addiction on football, horse racing, etc. Gambling on stocks and shares, currencies, and derivatives (junk bonds) is not referred to as gambling but investing.
"Gaming" can also refer to computer modelling of various scenarios to try to establish an optimum outcome by changing variables, parameters prior to attempting a strategy in the real world.
So the first, not the other two maybe, although the IT skills are transportable.