As for the Church of Sweden, sure whatever. Christians have been redefining things for a long time so I can’t be surprised at this.
As @tekk pointed out, and @PatrickD got nearly right, Hebrew is a gendered language and nearly all Names in the Tanach are in the masculine form. There are exceptions but getting into that in this thread, it depends too much on rabbinics and issues that are not really explainable without a pretty good foundation in Torah study to begin with.
AKA Maimonides Negative Theology. No he wasn’t the first to advocate this, as you point out there were Christian discussions much earlier. I only link to this since discussion of gender in relation to God can only be viewed with consideration of the Hebrew sources.
