Yes gargling with Apple Cider Vinegar can help to get rid of bad breath.
Apple Cider Vinegar is antibacterial which can kill off the bacteria that causes bad breath and it can also help to prevent gum disease as well as tooth decay.
Apple Cider Vinegar is a natural great mouth wash to keep both your teeth healthy and help with getting rid of bacteria causing bad breath.
Flossing your teeth and brushing your teeth with some toothpaste for bad breath can also help with bad breath problems.