You can enable GLS as a provider in both the Admin Dashboard and in Shopify.
Enabling GLS on the admin dashboard
In the left menu bar, find Configuration, and select Providers.
Under General, make sure Available for customers is toggled on.
Select available delivery types.
You can choose from home delivery and pickup point delivery.
Provide your myGLS credentials:
Username
Password
Client number
Click Save.
Enabling GLS on Shopify
Open the Shopify admin and under Apps, select Delivery Gateway.
Select Provider settings on the left.
Click the Edit icon of the provider you want to configure.
Check Available for customers to enable the provider.
Check at least one of the Available for pickup and Available for delivery options.
Select the Direct integration type.
Provide your myGLS credentials:
Username
Password
Client number
Under Display fields, configure how the provider appears to your customers. You can customize the following information:
Title
Priority: This determines the position of the provider in a selection list.
Information for home delivery: Important information about home delivery, such as estimated time or any restrictions.
Information for pickup point delivery: Important information about pickup point delivery, such as opening hours.
List of required address fields for home delivery: Information the customer must provide for home delivery. For example, name, email, phone number, language, country, state, or city.
List of required address fields for pickup point delivery: Information the customer must provide for pickup point delivery.
Click Save.