Gloria’s sister, Gwen Steelman, also went to Mar-Ken.
From the Mar-Ken 1940 Yearbook:
Gwen’s younger sister, Gloria, is next to enter the “hall of fame”. She steps in directly from Glendale. Like her sister she is a singer. And like her sister she dislikes radishes and also green onions. At present her ambition is to become a singer (which she really already is!) And you can safely put your money on the Steelman Sisters to “swing out” in the future with some “hep songs”.
From the September 27, 1940 Mar-Ken Journal:
ALUMNI: Gwen and Gloria Steelman and Betty Cox (Junior) are singing under management of M.C.A.
From the October 25, 1940 Mar-Ken Journal:
ALUMNI: Gwen and Gloria Steelman are continuing their musical career.