The register
The register lists Gm Security Agency Limited in London as a licensed sponsor on Skilled Worker, an entry that goes back to at least 2026. Rating on the current register: Worker (A rating).
At Companies House the business is GM Security Agency Limited (company number 13213124), a private limited company incorporated in 2021, 5 years ago. The registered office is at 45 Dudley Road, Rowley Regis, West Midlands, B65 8JH, B65 8JH. By its SIC codes the business is in security, cleaning and facilities. It has traded under other names before, including GM Security Services Ltd.
Holding a licence is the expensive, slow part done. For Gm Security Agency Limited the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.