IAG GBS | 27,243 followers on LinkedIn. IAG GBS is part of International Airlines Group (IAG), one of the world’s leading airline groups. | IAG GBS (Global Business Services) is part of International Airlines Group (IAG), one of the world’s leading airline groups, and the parent company of airline brands including British Airways, Iberia, Vueling, Aer Lingus, and LEVEL. IAG’s business model is unique. It is based on a light structure at the centre, with agile, empowered, and focused airline operating companies accountable for results, and a central platform providing a competitive advantage through scale and world-class expertise.