Gestational diabetes mellitus (GDM) is one of the most common pregnancy complications, with both short- and long-term consequences. We conducted a user needs assessment of GDM care and management through semi-structured interviews with healthcare professionals and women with GDM. Examining current GDM care, we found that time management, number and attendance of appointments, information, resources and education, and cultural social and language differences were affecting factors. Furthermore, participants suggested a digital tool to include notification and prompts, risk stratification, and information and resources. The results of this study form the foundation of a user-centred digital tool that has the potential to transform GDM care and management.