A single GBAS ground station can support multiple runway ends and many approach procedures. Unlike ILS, which requires one tuned frequency per installation, GBAS typically needs one VHF assignment to serve up to 48 approach procedures. This consolidation reduces installation, inspection and maintenance costs and simplifies airport infrastructure and VHF spectrum use.

GBAS has more permissive siting criteria than ILS and can serve runways that ILS cannot. GBAS siting can minimise critical protected areas on the ground, reducing restrictions on taxiing and other surface movements and easing airport operations.

GBAS supports straight‑in, curved and segmented approaches and can provide optimised, tailored final approach paths (including steeper profiles) that avoid obstacles and noise‑sensitive areas.

A single GBAS installation can replace multiple ILS units, enabling precision approach capability at airports where traditional ground navaids would be impractical or cost‑prohibitive.

Precise lateral and vertical guidance and optimized approach trajectories enable continuous descent approaches and reduce level‑offs, holds and missed approaches. These improvements lower fuel burn and operating costs and improve schedule predictability.

By enabling continuous descent and curved routing around populated areas, and by supporting tailored glidepaths, GBAS helps reduce community noise exposure and gas emissions.

GBAS broadcasts differential corrections and integrity data so airborne systems can compute protection levels and pilots make safety‑critical go/no‑go decisions. Redundancy and ground monitoring improve fault detection and reduce the risk of undetected errors.

GBAS typically requires less frequent flight inspections than each separate ILS installation, lowering recurring inspection costs and operational disruptions.

GBAS is compatible with PBN frameworks as a GNSS‑based landing system (GLS) and enables RNP‑to‑GLS procedures. Ongoing GAST developments and multi‑frequency/multi‑constellation implementations aim to extend GBAS capability toward lower minima and CAT II/III autoland operations.