[2] Gilmartin attended Catholic high school, graduated near the top of her class, and received a large aid package to Fordham University, where she completed her BA and MA.

[3] The role exposed her to the concept of large-scale urban development for the benefit of both the economy and the general public.

[9][10] In 2014, Gilmartin and Ratner were awarded the Municipal Art Society (MAS) Jacqueline Kennedy Onassis Medal.

While the Historic Districts Council and other preservationists marked this as controversial, the MAS defended their choice based on Ratner and Gilmartin's focus on creating affordable housing, innovative modular building techniques, and commitment to New York's future.

[12] In July 2020, she split with L&L to form the New York-based, women-owned urban real estate company MAG Partners,[7][13][14] where she serves as founder and CEO.