Command line installation (CLI) is not support for NetScaler URL. But, there are 3 options available that may be helpful.
1. Export store provisioning files for users https://docs.citrix.com/en-us/storefront/2-6/dws-manage/dws-manage-store/dws-export-file.html
2. Configuring NetScaler Gateway Store via GPO https://docs.citrix.com/en-us/receiver/windows/4-5/configure/receiver-windows-configure-app-delivery-wrapper.html#par_anchortitle_80df
3. Connecting to StoreFront by Using Email-Based Discovery http://docs.citrix.com/en-us/netscaler-gateway/10-1/ng-xa-xd-integration-edocs-landing/ng-clg-integration-wrapper-con/ng-clg-session-policies-overview-con/ng-clg-storefront-policies-con/ng-clg-storefront-email-discovery-tsk.html From the end-users perspective email discovery may be easiest. But requires support configuration of DNS entry and other configuration as noted in documentation. The export store provisioning file is easy to generate file in StoreFront, but requires user to open .CR file (it’s an XML file that is FTA with Receiver) and accept configuration (click “yes* button) and certificate accept dialog may display. So, it requires some user interaction and depends on end-user training even if the training is minimal. The GPO push of NetScaler URL (Configuring NetScaler Gateway Store via GPO) requires users to be connected to the domain to receive policy and configuration.