Found out there is gas in the engine oil, what.

Depends on how much and how long it took to accumulate. Leaking injector, leaking fuel pressure regulator, excessive fuel pressure, prolonged misfire, too much short-trip driving.

Also a clogged PCV system (it will cause your oil to smell like gasoline), however if you have so much gas in the oil that it causes the oil level to rise, the PCV likely is not a fault.