In the Australian maternity system, general practitioners play a vital role in advising and directing prospective parents to maternity models of care. Optimising model of care discussions and the decision-making process avoids misaligning women with over or under specialised care, reduces the potential for disruptive care transitions and unnecessary healthcare costs, and is critical in ensuring consumer satisfaction. Current literature overwhelmingly focusses on women's decision-making around model of care discussions and neglects the gatekeeping role of the General Practitioner (GP). This study aimed to explore and describe the factors influencing Australian GPs decision-making when referring pregnant women to maternity models of care. This study used a qualitative descriptive approach. General practitioners (N = 12) with experience referring women to maternity models of care in Australia participated in a semi-structured interview. Interviews occurred between October and November 2021 by telephone or videoconference. Reflexive thematic analysis was facilitated by NVivo-12 data management software to codify and interpret themes from the data. Two broad themes were interpreted from the data. The first theme entitled 'GP Factors', incorporated three associated sub-themes including '1) GPs Previous Model of Care Experience', '2) Gaps in GP Knowledge' and '3) GP Perception of Models of Care'. The second theme, entitled 'Woman's Factors', encapsulated two associated sub-themes including the '4) Woman's Preferences' and '5) Access to Models'. This study provides novel evidence regarding general practitioner perspectives of the factors influencing model of care decision-making and referral. Predominant findings suggest that gaps in GP knowledge regarding the available models of care are present and are largely informed by prior personal and professional experience. Most GPs described referring to models of care they perceive positively and centring their model of care discussions on the woman's preferences and accessibility. The exploration and description of factors influencing model of care decisions provide unique insight into the ways that all stakeholders can experience access to a broader range of models of care including midwifery-led continuity of care models aligned with consumer-demand. In addition, the role of national primary health networks is outlined as a means to achieving this.