Human societies organize by social categories. In this paper, we explore how a group identity that has recently grown in cultural importance - gender identity - affects prosocial behavior. In our experiment, participants played 8 rounds of dictator games with 8 different receivers. In the “Mandatory” treatment condition, participants played the role of dictator with full information about their receivers’ preferred pronouns, and with the understanding that this disclosure of pronouns had been mandated as part of the study setup. In the “Voluntary” condition, dictators played the games with information about receivers’ pronouns only when those receivers voluntarily disclosed them. A preliminary analysis revealed null effect by treatment conditions and heterogeneous giving by participant’s political affiliation and the type of gender pronouns shared by the receiver. An extended analysis will be available in May 2025.