So Katie is bringing the case because:
GG have changed their policies to allow the admittance of male children and leaders into their single-sex organisation as long as they say they identify as female.
Because GG have a policy that any male, child or adult, who says they identify as female, is allowed to share intimate spaces such as sleeping arrangements and showering facilities with its biologically female members.
Because GG have a policy whereby biologically male adults who identify as female are permitted to provide intimate care to female children.
because GG have a policy whereby they do not and will not inform parents of any of the above when it applies where their children are in the care of GG.
Because GG are allowing admittance of males who identify as female to their organisation, but have a policy of disallowing females who identify as male.
Because GG have a policy of zero tolerance towards anybody raising concerns abut all the above, ad have, and will continue to dismiss anybody who does so.
Because GG, a charitable organisation who function as a result of donations from members of the public are using vast amounts of money defending the above, and in order to do so they are spending vast sums of money requesting extra hearings and paying a very expensive legal team to argue bitty little points in order to intimidate the other party and increase her costs in the eventuality that she loses.
YANBU OP, and quite honestly anybody who thinks otherwise is either naive, malicious or willfully ignorant.