E
The natural minor has 5 and the harmonic minor has 4 and a double sharp.
G# A# B C# D# E Fx (double sharp) G#
It's not equivalent to any sharp, but it is equivalent to D double sharp.
The equivalent of an f sharp is a G flat.
an a flat only can be called an a flat There is no double sharp equivalent, but it is the same as G sharp.
A harmonic minor.
G-sharp natural minor has five sharps (F♯, C♯, G♯, D♯, A♯) but the raised seventh degree turns the F♯ into Fx (F double sharp). So the key of G-sharp harmonic minor has four sharps and one double sharp.I hope that helps.
B♯, Cx, D♯, E♯, Fx, G♯, Ax, B♯. x means double-sharp.
A harmonic minor.
A harmonic minor
B sharp, C double-sharp, D double-sharp, E sharp, F double-sharp, G double-sharp, A double-sharp, B sharp.
A double sharp raises a natural note up a tone - so lets take for example F double sharp. F double sharp is one whole tone higher than F which is enharmonically equivalent to G natural.