I am sorry but I have no idea what this passage means since I have not made a study of the Gospel of Thomas. Many consider it some sort of Gnostic development of a genunine Gospel tradition that developed during the mid to latter part of the 2C AD. Under those circumstances it could not have been written by the Thomas it supposedly represents. But discussion of this material is a path I don't want to go down.
I think that confining this discussion to the Watchtower concept of the 144k "anointed" and women is complicated enough. According to the Watchtower the 144k:
1 Started in 33 "CE" and included every member of those who were called to be believers during the first century AD, supposedly including women.
2 Further, according to Watchtower, these "anointed" members were all part of the FDS: "The expression faithful and discreet slave refers to ALL members of that anointed nation as a group on earth at any particular time from 33CE till now" [Watchtower Mar 1st, 2004, page 10]
3 If this refers to all members of the "anointed", and since the primary object of the FDS is to define theology which is to be believed in as definitive, a process that the Watchtower defines as "feeding", the question we need to ask is:
What part do the female members of this FDS 144k play in this feeding process, seeing that the Watchtower insists on the possession of a penis as a prime requirement for being such a formulator of theology, or in other words, a feeder, not eater, of the "spiritual food". Therefore the female members of the "anointed" during the first century did not "feed" the domestics, they merely ate what was "cooked up" and presumably have not done so in the "modern era either.
If, by 31st Dec 100 AD there were some 100,000 Christians both male and female, and some 30,000 in the modern era, that would leave just 44,000 to run through the rest of the history of Christianity [some 1779 years, seeing the Watchtower started in 1879] or some 3 a year. [It is estimated that by the end of the first century the Christians made up at least 5 percent of the population of the Roman Empire which was estimated to be at least 20 million, hence they could have numbered at least 1 million. But that is another conundrum for the Watchtower]
Suppose all three in a year were women? Who then would do the feeding? Or would they all wear hats while doing this? What about our "modern" era? Do any female members of the "anointed" qualify as the FDS? If they do, then how do they participate in this feeding? Are they permitted to write Watchtower Study articles which clearly defines the parameters of Watchtower theology? Evidently not, since all this is left to the male members of the anointed. Writing obscure articles about the Amazon River, taken from reference articles in Encyclopedias, or writing simplistic letters to the "real" FDS does not count.
It becomes obvious that the Watchtower "definition" of the FDS as members of the 144k is ill-conceived. I propose they will have to redefine this by saying:
" The expression faithful and discreet slave refers to all male members of that spiritual nation as a group on earth at any given time"
Since the primary object in having an FDS is to conceive theology for the rank and file, and since women are disbarred from this, such a redefinition becomes imperaritive.