Yes - GDV can happen to any dog really, but the deep-chested dogs are more at risk. My wife (vet) sees bloated dogs fairly often and they do not all make it. If you do suspect bloat, do not wait to bring the dog in to the vet. The organs start to die as soon as the blood flow is constricted.
The dog's stomach will be very tight to touch, and painful, and they will likely be panting. They will dry-retch, may act strangely, getting up and laying down quickly or repeatedly. They'll act just plain uncomfortable.
A common factor is how fast your dog eats its meal. You should not allow them to inhale their food quickly. Also don;t let them drink a lot of water after a hard run or workout.
There is an operation that can be performed if a dog suffers bloat and survives (or even before so), where the vet will tack the stomach to the inner chest cavity wall. This will not prevent bloat re-occurrence (gas filling the stomach), but it will prevent the life threatening twisting of the stomach. My wife performed it on our friends' great dane when the dog was in the hospital for another stomach related incident (operation). This was a preventative measure simply because Danes are at high risk.