Yes, cats can jump over baby gates. In fact, they can jump over just about anything that's in their way. That's because cats are natural jumpers. They're built for it, with their powerful hind legs and flexible spines.
So if you're trying to keep your cat contained with a baby gate, you might want to rethink your strategy. There are other ways to keep your cat contained that are more effective. For example, you could try using a catio, or an enclosed outdoor space for your cat to enjoy. You could also try using a cat tree or cat scratcher to give your cat a place to scratch and climb without getting into trouble.