  We present the results for the Generalized Transverse Momentum Distribution
related to quark Orbital Angular Momentum, {\it i.e.} $F_{14}$, in the MIT bag
model. This model has been modified to include the Peierls--Yoccoz projection
to restore translational invariance. Such a modification allows to fulfill more
satisfactorily basic sum rules, that would otherwise be less elegantly carried
out with the original version. Using the same model, we have calculated the
twist-$3$ GPD that corresponds to Orbital Angular Momentum \`a la Ji, through
the Penttinen--Polyakov--Shuvaev--Strikman sum rule. Recently, a new relation
between the two definitions of the quark Orbital Angular Momentum at the
density level has been proposed, which we illustrate here within the model. The
sum rule is fulfilled. Still within the framework of the MIT bag model, we
analyze the Wandzura--Wilczek expression for the GPD of interest. The genuine
quark-gluon contribution is evaluated directly thanks to the equation of motion
of the bag, which allows for a direct control of the kinematical contributions
to the twist-3 GPD.
