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G forces are a MEASURE for centrifugal force, which acts in all directions, and is measured in G's

gforce is a measure of acceleration and can be induced when moving in a straight line. Centrifugal force is only induced in a curved path. The g-force on something is its acceleration relative to free-fall.[1][2] This acceleration experienced by an object is due to the vector sum of non-gravitational forces acting per unit of the object's mass. Such accelerations, termed "proper accelerations," not produced by gravity itself, cause stresses and strains on objects which can make these sorts of forces significant. Because of these strains, sufficiently large g-forces may be highly destructive to objects and organisms.

Centrifugal force (from Latin centrum "center" and fugere "to flee") represents the effects of inertia that arise in connection with rotation and which are experienced as an outward force away from the center of rotation. In Newtonian mechanics, the term centrifugal force is used to refer to one of two distinct concepts: an inertial force (also called a "fictitious" force) observed in a non-inertial reference frame, and a reaction force corresponding to a centripetal force. The term is also sometimes used in Lagrangian mechanics to describe certain terms in the generalized force that depend on the choice of generalized coordinates.