Integral membrane proteins, such as transport proteins, are permanently attached to cellular membranes. after integral membrane proteins are synthesized, which organelle would aid in transporting them to their final destination?

ER Golgi apparatus, because it packages proteins received from the ER cytoplasm 

The Golgi body are the ones that slightly alter, organize and prepare so-called parcels to be delivered for all the organelles in the cell. They receive these packages mainly in the rough endoplasmic reticulum. These packages that set out by Golgi body are macromolecules that used and synthesized by cells in many operations. If ER is absent then it would only mean that Golgi body would have no use other than simply lysosomes but these macromolecules plays a dynamic role in many organelles –nutrients, ATP and cell metabolism. It'll have a ripple effect if ER is absent in the cell.