Yes, it sure is.
The corresponding minor key to G Major is e minor. The key signature will be the same, one sharp: F#.
The parallel minor of F-sharp major is F-sharp minor. A parallel minor key is the one with the same tonic note.
The key of E minor has one sharp: F sharp. It is the relative minor of G Major.
A major, or F# minor
Four key signatures have G sharp and E sharp in them: F sharp Major, D sharp minor, C sharp Major and A sharp minor.
Firstly, there is no B minor chord in the key of F sharp minor. Rather, it is A sharp minor chord. And you can use any chord at the end of a chord progression. Why not!
G (or E minor)
B Major and G sharp minor. The sharps are F, C, G, D, and A sharp, in that order.
F# major, C# major, D# minor, and A# minor
G Major or e minor. The sharp would be F sharp.
The relative minor of C major is A minor, and the relative majors of C major are G major and F major.
The key signature with 7 sharps is C-sharp major. In this key, the sharps are F-sharp, C-sharp, G-sharp, D-sharp, A-sharp, E-sharp, and B-sharp. Its relative minor is A-sharp minor, which also features the same key signature.