The best replacement for g force is rpm.

The best alternatives to g force are rated as following:
★★★★★  rpm
★★★★  g major
★★★★  g major 2
★★  g system
★  bank angle
★  g force
★  rcf
  gatchaman
  battle of the planets

Your alternative for g force is not listed? Suggest!
Speaking about g force, one probably shouldn't forget about roller coasters.

Other search terms related to g force and their ratings are:
★★★★★ roller coasters
You have in mind a companion for g force and it is not yet here? Propose!



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g force
rpm
g major