If there are any true-born Garleans with the Echo, then I would imagine life would be extremely unpleasant for them - in 1.0 Echo-users were actively persecuted by the Empire (because of the Echo ability to understand the Beastmen, and thus the Empire regarded those who could communicate with the beast tribes as a beastmen themselves, and therefore a heretic to be hunted down and executed).
Even here in ARR, the Empire now would just incarcerate them and use them as a glorified lab rat to understand the secrets of the Echo (specifically, how it renders a person immune to Primal influence/tempering) - after all this is why
Livia took Minfilia prisoner during ARR's story.
No, I don't think if there is any Garleans who are awoken to the Echo - if there was, they most definitely would have been discovered long ago and imprisoned in research facilities - what happened to the Waking Sands more or less proves that.

Originally Posted by
Hieral
There's a lovely little pair of Garlean goggles that drop from mobs in Northern Thanalan. It's a SURPRISE headpiece.
That's the Legionary Visor, and it doesn't just drop there. It drops from generic Garlean soldier type mobs which are found all over Eorzea, such as Cape Westwind in Western Thanalan, and the Sylphlands in the East Shroud. It's a fairly common drop too, given the fact the item is rather worthless other than glamour and therefore is just junk.