No — no consultant does, whatever the brochure says. Every licence, permit and approval decision sits with the authority concerned. GGB prepares the documents, files through the licensed channels or coordinates your PRO, and sequences the submissions so nothing is filed before the step it depends on. That sequencing is where most setup delay is actually created, and it is the part GGB controls.
From Restaurant Business Setup in Dubai — the full reading, with the method behind this answer.