Yes, u-blox provides a comprehensive user guide for AssistNow libMGA, which includes code examples and step-by-step instructions. You can access the user guide here: AssistNow User Guide
The libMGA code and release notes are available to customers via u-blox services support. Please contact us at firstname.lastname@example.org for more information. In the email, please include your Company name, best contact for NDA, and Thingstream domain/portal (primary email works too).
Note: The libMGA is integrated within u-center, the u-blox GNSS evaluation software.