Do freefallers -that go on to use parachutes- experiece G-forces and if so how many?

Yes, freefallers do experience G-forces during their descent. Initially, as they accelerate due to gravity, they can experience up to 1.5 Gs, which is similar to the force felt when accelerating in a car. However, once they reach terminal velocity, the G-forces stabilize at around 1 G, as the force of gravity is balanced by air resistance. After deploying the parachute, the deceleration can result in a brief spike in G-forces, potentially reaching around 3 Gs or more during the rapid slowdown.