Do all mouthwashes get rid of gingivitis?

NO WAY. Gingivitis cannot go away on its own or merely with mouthwashes. The smell and symptoms (bleeding, discomfort, etc.,) may be masked. Get to a dentist for a thorough cleaning and proper dental hygiene instructions.
No. No mouthwash can get rid of gingivitis by themselves. Proper oral hygiene with brushing and flossing twice a day, in addition to visiting your dentist at least twice a year, are the main things to get rid of gingivitis. Mouthwashes can help, but they are not all equally effective.

Related Questions

Which type of mouthwash should I use to get rid of gum disease?

None available. Gum disease (periodontal disease) cannot be treated and cured with mouthwash. You need to see a dentist to have your teeth cleaned and a treatment plan devised as to how to correct your problem. After treatment, you can maintain your healthy mouth with proper brushing and mouthwash.
No. Mouth wash is an adjunctive therapy, not definitive therapy, in prevention of gingivitis. You control the gingivitis by good brushing and flossing, then the mouth wash would help to establish the feeling of fresh and wellness. However, in the case of true gum disease (there are other factors), mouthwash is not enough. Your dentist check up would help to diagnose gum disease, if it occurs.
Peridex (chlorhexidine gluconate) No mouthwash will get rid of gum disease, but of all the ones available, Peridex (chlorhexidine gluconate) is the best because of the substantivity of Chlorhexidine (it stays on the tissue after rinsing). If you have anug or nup - gum diseases caused by immune problems/stress/and bacteria, hydrogen peroxide can help. Be careful not to rely on these things - the only way to get rid of it is treatment.
See the dentist. If you really have gum disease, you cannot get rid of it yourself. Mouthwashes that help kill the offending bacteria are great for prevention, but once you have gum disease you will need some help. If you just have gingivitis, you might get it to subside a bit with listerine. The best mouthrinse is by prescription only.

Toothpaste for preventing gingivitis? Do those toothpastes and mouthwashes that claim to fight tartar also help prevent gingivitis? Are they really better than regular toothpastes?

In. In a nutshell, no. There is no miracle mouthwash or toothpaste that will help prevent cavities or gum disease nearly as well as proper brushing and flossing daily.
Yes. It is not the paste alone. It is usually also how well you clean your teeth.
It's all marketing. No matter what toothpaste you use, brushing and removing plaque at the gumline is what prevents gingivitis. Always use a Fluoride containing toothpaste but it really doesn't matter which one. Use the one that tastes and feels the best to you. Most tartar control toothpastes help prevent tartar formation but tartar will still build up over time. Get your teeth cleaned 2x/year to remove tartar.
Prevent Gingivitis. They're not better just different they contain a chemical that keeps the calcium in your saliva from hardening in your plaque. If you brush well enough the plaque will not build up to be able to solidify into tartar. If you do have an excessive amount of buildup you should have your systemic ph checked. Your body ph can be too acidic leading calcium to be leached out of your bones.

How can I prevent gum disease if I smoke? I’ve heard that smokers get gum disease more than other people. I can’t seem to quit smoking, so i’d like to know how to prevent gum disease. Should I brush more often. Is there a mouthwash that will help?

There. There is no absolute preventative thing you can do to counteract smoking which puts a large plaque film on the teeth especially under the gum line. So quitting smoking is the key. However, if you can't stop-- make sure you brush and floss properly daily and get a professional cleaning every three to four months.
Smoking... You are correct about smokers having a higher prevalence rate of gum disease than non smokers. My suggestion: do anything that can help you quit smoking. It will not only save your teeth (with professional care) but also save your life. There isn't any magic rinse. You can practice excellent oral hygiene and be followed by a qualified dentist or periodontist to keep you out of big trouble.
Great oral hygiene. Smokers can have 4x as much gum disease as those who do not smoke. Smoking is a large contributing factor to gum disease, but so is bacterial plaque. Meticulous oral hygiene will help decrease the amount of plaque and bacteria in your mouth and may help to slow or prevent gum disease. Mouth washes can be a nice adjunct to brushing and flossing, but it does not take the place of either.
Floss! Most people won't floss and so the gum disease starts between the teeth. Of course brushing is important as well, but if you are a diligent flosser, and use a mouthrinse to help, that is the best we can hope for.
Good oral hygiene. Good oral hygiene plays a great role in prevention, treatment, and maintenance of your periodontal health. Smoking is only a risk factor in term of regeneration of loss bone due to gum disease, but not a risk factor in acquiring gum disease. Nicotine constricted blood vessel which impaired wound healing. It causes root surface roughness and attracted plaque buildup which needs to be cleaned.