GGB Restaurant and bar is a licensable DIFC activity. The Operating Regulations set an authority fee of 7% of monthly establishment sales for establishments including restaurants and bars licensed to sell, serve or distribute alcohol. Confirm the permanent alcohol-licensing route and required approvals with DIFC in writing before committing to a lease that depends on a bar; the official sources reviewed here do not establish the permanent licence issuer for a standalone venue.
From Opening a restaurant or bar in DIFC: licensing, costs and timeline — the full reading, with the method behind this answer.