Abstract: Both the recently upgraded JLab as well as the planned EIC will provide three-dimensional precision snapshots of the quark gluon structure of protons and nuclei. While twist-2 Generalized Parton Distributions (GPDs) allow for a determination of partons in the transverse plane, twist-3 GPDs contain quark-gluon correlations that provide information about the transverse color Lorentz force acting on quarks in a DIS experiments. The example the nonforward generalization of the polarized PDF $g_T(x)$ is used to illustrate how twist-3 GPDs can provide transverse position information about that force.