The register
The register lists GBS 1 & 4 U LTD 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 GBS 1 & 4 U LTD (company number 09949923), a private limited company incorporated in 2016, 10 years ago. Registered office: 126 Northfield Avenue, London, W13 9RT, W13 9RT. Its filed activity puts it in construction. It has traded under other names before, including GBS 4 LTD.
Holding a licence is the expensive, slow part done. For GBS 1 & 4 U LTD the question each time is only whether the role and the pay fit the current rules, and that is checked per vacancy.