no such thing as a "gaming" chair
its all just design and marketing
what you want for prolonged use, like long gaming sessions is a chair that is comfortable to your specific body, since people are different
a chair might feel very comfortable initially, (especially when you're just used to a wooden chair), but the same chair can actually start to be uncomfortable after many hours of straight use
same reason some people prefer hard vs soft madrases
since your coming from a wooden chair, any chair would likely be an improvement, just dont get to sold on the "gaming chair" as such, because thats purely marketing
i've used and tried several chairs during my days, and right now, i found my perfect seating arrangement, my small couch,
, it has the support for my back, and my weight, and is comfy enough i can sit in it for hours on end in computer sessions, and got a nice wide armrest too
your best bet is to try different chairs in stores, but that will only give you that "initial feel",
a good way to find what type of chair is best for you and your body, is to use/borrow friends/family/coworkers chair for some hours, and then determine your needs, and which style you find most comfy to your body in the long run
body, weight, back support, arm rest/arm placement compared to desk, plays a more important role for selecting a chair in long continuous sessions
its sorta like shoes, you can get some great "flashy" shoes, that feel good and look awesome, but after walking in them for 4 hours your just wanna cut your feet off to get some rest