That really depends on your skin elasticity and underlying muscles as well as percentage of body fat. Patients are pleased to no longer have a feminine appearing chest after gynecomastia surgery. Body builders typically have a very low percentage body fat that allows the skin to show off the muscles underneath. So if your skin is very elastic, and you lose the body fat and build the muscles yes- but not simply because of the surgery.
Your results following surgery for gynecomastia correction depends on your native soft tissue laxity, your percent body fat, and the underlying muscular frame. Without the benefit of photos and an examination, it is not possible to give you much direction. Best visit with two plastic surgeons for at least two opinions. Best wishes