GACS provides professional aviation technical support services in the following areas: 
Inspections -
- Aircraft factory in-production.
- Aircraft delivery/re-delivery.
- Aircraft/Engine lease in/lease return.
- Airport Apron/Runway.
- On site borescope.
Entry into service support -
- Aircraft acceptance.
- Line maintenance set up
- Start up spares, Ground support equipment and tools provisioning.
On site Representation -
- Aircraft/Engine/Component Manufacturer (OEM)
- Aircraft/Engine MRO Supplier.
Valuation -
- Aircraft (Used to buy or lease).
- Engine (Used to buy or lease).
Contract negotiations -
- Aircraft lease.
- Engine lease.
- Engine purchase.
- Aircraft purchase
Engine repair/refurbishment work scoping.
Invoice reconciliation -
- Engine repair/refurbishment against work scope.
- Aircraft major check against workpackage.