Whilst we use G force routinely whilst whizzing around in fast pointy things, I must echo previous threads in assuring you that you would experience no such thing in commercial flying.
G force is uncomfortable at first but you'd get used to it with time. I'm a tall skinny git and even I can handle G (sustained +8 is my best so far, though not in my present aircraft type before any smart arses leap in!) so you'd be fine anyway.
BV
