G#/Ab minor–> Bb Minor or Db Major = 5 flats

F#/Gb major–> Ab Major or F minor = 4 flats

D#/Eb minor–> F minor or Ab Major = 4 flat

C#/Db major–> Eb Major or C minor = 3 flats

A#/Bb minor–> C minor or Eb Major = 3 flats

G#/Ab major–> Bb Major or G minor = 2 flats

F minor–> G minor or Bb major = 2 flats

D#/Eb major–> F Major or D minor = 1 flat

C minor–> D minor or F major = 1 flat

Don’t forget that your order of flats are Bb Eb Ab Db Gb Cb Fb and your order of sharps are F# C# G# D# A# E# B#

You are right, a Major and coresponding minor scale have the same Key Signature. A minor scale is just a major scale started from the sixth note.

A C Major scale is CDEFGABC The sixth is A so an A minor scale is the same a a C Major but it starts on A and ends on A making it ABCDEFGA.

I hope this helps.