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Measurements involving the gluon spin density, Delta G=G++ - G+-, can play animportant role in the quantitative understanding of proton structure. Todemonstrate this, we show that the shape of the gluon asymmetry, A(x,t)=DeltaG(x,t)/G(x,t), contains significant dynamical information aboutnon-perturbative spin-orbit effects. It is instructive to use a separationA(x,t)=A_0^epsilon(x)+epsilon(x,t), where A_0^epsilon(x) is an approximatelyscale-invariant form that can be calculated within a given factorizationprescription from the measured distributions Delta q(x,t), q(x,t) and G(x,t).Applying this separation with the J_z=1/2 sum rule provides a convenient way todetermine the total amount of orbital angular momentum generated by mechanismsassociated with confinement and chiral dynamics. The results are consistentwith alternate non-perturbative approaches to the determination of orbitalangular momentum in the proton. Our studies help to specify the accuracy thatfuture measurements should achieve to constrain theoretical models for nucleonstructure.

Studying Spin-Orbit Dynamics using Measurements of the Proton's Polarized Gluon Asymmetry