I have just now downloaded the book Sri Guru Charitra. At the last section, the rules of properly reciting it are given and which are as follows:
Namdharak- "Kindly tell me the procedure of week-reading and other
rules to be followed during the week".
Shri Siddha-"Shri Guru-Charitra can be read any time with pure mind.
The credit of reading it in a week is still great. For this, one place
and seat should be selected. Keep control on the senses during the
week. Before starting the reading bow to God, Brahmin and elders.
Worship the volume of "Shri GuruCharitra". One should complete 7
chapters on the first day, read upto 18th chapter on the second day,
upto 28th on the third day, upto 34th on the fourth day, upto 37th on
the fifth day, upto 43rd on the sixth day and upto 52nd chapters on
the seventh day. After reading, worship the volume and take light
dinner. Some observe fast for the week; but if this is not possible
have food of only one type of corn. On the eighth day, for completion
of the week reading, take meals with a Brahmin couple and offer money
as Dakshina. If the reading is done with devotion and pure heart, Shri
Guru gives Darshan in dream and fulfills one's desires. The trouble of
spirits and ghosts vanishes and one gets peace of mind. Namdharak
again expressed to Shri Siddha Muni his gratitude for narrating the
life of Shri Guru, which has made his life fortunate and enabled him
to attain the bliss
So, it does not prohibit the women explicitly neither does it allow explicitly.
And, furthermore, this book, in one section, is having a part of Guru Gita too. And, it says that Guru Gita can be recited by everyone.
Recitation of Guru-Geeta, gives one incentive power, develops one's
qualities, destroys evil acts, makes good acts successful, removes
fear of Grahas
(planets), destroys evil dreams, gives issues even to sterile women,
gives good luck to the married women (keep their husbands alive all
their lives) and gives peace of mind. If a widow reads Shri Guru-Geeta
without object, she gets salvation. If she reads with desire, she will
get a good husband in the next birth and all her miseries,
difficulties and curses will perish.
So, I am not sure why reading the book Guru Charitra will be forbidden for women.