G-Force is a very different type of ride, most people find the upward climb very uncomfortable, no similarity at TP, unless the vertical on Saw compares for you.
We are all very different, in our physique, and attitude to the rides, so I always suggest for a nice, smooth introduction to inversions, go on SWARM. Do not miss out on Flying Fish, it's good. Nemesis Inferno is very good as with the pendulum action, you feel the ride differently. Take your ear-rings out for Colossus.
Enjoy your time there.