Re: gender-specific references to Holy Spirit???

2 Cor 3:18 refers to the Spirit as Lord or Kurios.  This is a strong
direct reference.
As to the neuter gender of the word Pneuma; the word in Hebrew is Ruach
which apparently is feminine.  A lot of feminine theologians attempt to
use this to apply feminine ,personal pronouns to God.
I'm not absolutely sure but the word for testicle in the Hebrew is
apparently a feminine noun.