You can ride a gaited horse in any saddle that fits.
That said, a steer roping saddle with full skirts can be problematical with some horses due to the way they move. Horses with short backs can be a challenge, but this just means the rider has to be a little smarter than the saddle!!!!!
The "gaited horse saddle" is a marketing approach, not a saddle design approach. They are not necessarily bad, but neither are they necessarily good.
I don't seen any inherent difficulties in the saddle noted in the photo. It might work, it might not.
Personally, I've always had minimal skirting on my Western saddles. I'm not out roping 1700 pound ladinos
in brush country so I just don't need that level of saddle strength. That strength comes at the price of significant weight. With horses it's generally not the miles but the kilograms!!!
So find a saddle that fits the horse and
meets the requiements of the discipline in which you ride.
Good luck in your choice.