A "gaited" horse is one that does gaits other than the trot. In the US...they are fairly common including the Tennesee walking horse, Missori fox trotter, and the PasoFino. All produce a gait that is smoother than a trot. Here are a few videos.
Ah I see, we have Trotter's over here and they are usually driven not ridden, I would say the most popular breed that do this other than a specially bred trotter, would be a Hackney, Thankyou for explaining it for me.
I think you misunderstood because Hackneys and trotters have nothing to do with gaited horses. In fact gaited horses are the complete opposite - They do NOT trot (well they can but it's usually considered undesirable).
Basically a gaited horse is one that can move at the speed of a trot (sometimes faster) while always keeping at least one foot on the ground. That means that they don't bounce the rider up and down. The gaits they do instead of a trot are called "easy gaits" or "smooth gaits" and the ability to perform them is inherited. Different breeds are associated with different easy gaits.
Well that's news to me. I have 5 different books on horse breeds and none of them say that hackneys pace. In fact one says right in the introduction "Hackneys were born to trot." And why would a horse be called a trotter if it paces?
I'll assume it's a difference between the US and the UK.
But while we're on the subject, although some gaited horses do pace their "easy gait" is not a pace. Most gaited horse riders hate pacing a much as they hate trotting!