All of the GLS Software products are market leaders in Southern Africa in their respective fields with some or all of the products implemented in cities, such as Tshwane (Pretoria) (650 000 stands), Ekurhuleni (Gauteng) (600 000 stands), Cape Town (650 000 stands) and Johannesburg (800 000 stands).

In addition, districts such as Metsweding (120 000 stands), Sedibeng and more than 50 other municipalities, including almost all of the municipalities of the Western Cape Province are using GLS Software directly or indirectly.

Civil Engineering Consultants throughout Southern Africa are using GLS Software on a daily basis to analyse or design water networks and sewer systems.

The Wadiso and Swift products have also been implemented in the Greater Vernon District and West Vancouver in British Columbia, Canada and a number of cities in South East Asia.