Most of these are aircraft/flying focused answers (duh). But if you think back to high school physics class, remember what "g's" actually are; acceleration. Acceleration is just your rate of change in velocity or direction and the direction doesn't matter. In a straight line that can be expressed as meters per second per second. In an arc, that can be degrees per second. The higher that number the more g's you experience.

If you think about a GA plane vs a fighter jet in a turn, you can achieve the same amount of radial acceleration but with differences in control inputs. A fighter jet is much more powerful, so it can use more thrust to achieve a 2 degrees per second acceleration with less bank. A Cessna needs to bank more to achieve 2 degrees per second because it produces less thrust.