When you pause a model using the Run Control toolbar or via an Interrupt element message, if the model was in the middle of computing an element within a SubModel, GoldSim will pause the model at that point.
Note, however, that when a model is paused, the status bar always displays the status of the outermost parent model.
Learn more about:
Pausing and Stepping through a Simulation
Continuing, Pausing and Aborting Simulation After an Interrupt