I think in gymnastics it is sliced different ways by different gyms in terms of what "talent" comes to mean. Some preteam coaches think they are genetic experts and can look at tiny kids and determine who does or does not have gymnastics "talent" potential based on body types or jumping/running/flexibility test. And they don't give anyone else opportunities to try team. Some give many a chance for preteam and see whose talent and work ethic emerges. Some do a hybrid, their own physical screening bias for picking pre and early team, but will add lots of optionals from other gyms who may or may not have had the same screening criteria for 6 or 7 years olds.
Some elite athletes come to mind (not in gymnastics) who I would not say are smart or brainy. I hear a lot of gymnastics coaches talk about gymnasts tending to be smart. I think this is hard to separate from other correlating factors (education/success level of parents being able to afford gym, time management/smartness required to succeed in school and still keep up training hours at a young age, caring coaches who emphasize education and school knowing that most of these girls are done with the sport at a young age. etc etc.). An elite hockey player has some different necessary qualities than an elite gymnast. Some optional gymnasts clearly have developed the kind of talent needed to be great dancers as well and some definitely have not.
I do think that, if pressed, most of us can pick out one or two among each group of compulsories at our gym who just seem really naturally "talented" for this sport in terms of physical abilities. Whether that holds up through puberty and into the emotional and competitive toughness it takes to get to level 10 or elite, well that's a whole different story. And I personally think kids who make it to the highest level (such as a world or Olympics team), are truly "gifted" physically and mentally, along with hard work/luck/great coaches/willing parents etc. Unfortunately, I think that "gifted" ideal filters down into screening of little kids at some gyms done by people who have never had an advanced biology course, let alone studied genetics, and definitely have never "hand picked" a kid themselves for team who ended up in the Olympics. For the other 99.99% of gymnasts, in my opinion, talent comes in various shades.....with the most important thing being what kind of person they turn into. And I like kind, humble, grateful people best.....and I guess that's a whole other kind of talent not related to gymnastics....but I do see a lot of it in this sport.