School-based Gender and Sexuality Alliance (GSA) clubs have well-documented benefits for sexual and gender minority (SGM) youth and their allies. However, little is known about what constitutes usual practice in these clubs, nor is much known about the adult advisors who serve as important safe adult relationships for SGM youth in schools. As such, the present study conducted a survey with 167 GSA advisors to gain a better understanding of usual practices within GSAs and advisor characteristics, training experiences, needs, and motivations in their role. Findings indicate that a majority of participating advisors are teachers in non-rural, public high schools. Only one third of participants indicated that they had received any training related to their role and all participants expressed needs for training across a variety of domains. In terms of their GSA meetings, participants indicated the frequency and duration of their meetings and the estimated amount of time spent focused on student emotional support, advocacy efforts, and social connection. We additionally conducted a thematic analysis surrounding advisor motivations to serve in their role. Themes included awareness of need, provision of a safe space, advocacy, and personal connections. Implications for provision of training and future supports for GSA advisors are discussed.