Ground Handling Agents have a role as a service provider at the airport. However, in most cases, they are bound to use the facilties provided to them by others. Very often the airport authorities are providing the facilities like a full functioning check-in desk with all its IT equipment and network infratructure. This is also the place where you find Common Use Systems like ARINC MUSE and SITA CUTE.
Travsys has software which can be adapted to the IT infratructure given to the GHA.