Try contacting a more traditional leaning order of Passionists. She’s a relatively new saint (1940s), so she’s not on the regular liturgical calendar, but they do observe her feast day and would have prior to the liturgical reforms, so they may have what you’re looking for archived some place. They could also be the regular common of a virgin.

@Arthur, an entirely new Mass and Office was approved in 1945. I've managed to track down most of the Mass propers, but I still don't have the proper gradual (and tract and second alleluia for Votive Masses), as well as the complete collects. No luck on the Office so far.

@aldrich, if you share the texts for the gradual, tract and second alleluia, I can check to see what I've got. Was the new Mass for the Passionists or universal?

@Arthur, gradual, tract, and second alleluia (plus offertory) are the ones that I don't have. Based on the decree, the new set of propers was first used in the Passionist monastery in Lucca, which the decree extends to the entire Passionist congregation, together with a higher rank for the feast.

@Chrism, yeah, that one helps for the introit and the alleluia, as well as the proper readings.

@a_f_hawkins, that one oration is actually a conflation of all three proper collects, sections from the main collect, the secret, and the postcommunion concatenated in the text.

For the record, here are the prayers at Mass for B. Gemmae Galgani from the Promptuarium Chorale (1937) [Passionist]. They are no longer applicable based on the excerpts in the document linked to by Chrism above.