A G quintuluple sharp would be raised four half steps, or two whole steps, making it a B.
G#
A flat. Because this note is between G and A, you can go up from G (make it a sharp) or down from A.
Technically speaking, D sharp major is: D#, E#, F* (F double Sharp,) G#, A#, B#, C* (C double sharp) D#. ***note: a double sharp (*) means that the note sounds a whole step above the principal note. For example: F*=G.
F sharp is the leading note (7th degree) of the G major scale.
F sharp
F would be C quintuple sharp.
Just as G sharp is one semitone above G, and G double sharp is two semitones above G, G quintuple sharp can be found five chromatic semitones--equal in twelve-tone equal temperament to a perfect fourth--above G natural. G quintuple sharp is enharmonic to A triple sharp, B sharp, and--most notably--C, as well as D double flat, E quadruple flat and F quintuple flat. On a piano, this note can be played by striking the white key immediately on the left of a pair of black keys. Triple sharps, triple flats, quadruple sharps and the such are very rarely encountered, and so the inability to play a quintuple sharp on the piano will not severely disadvantage one. Wherever did you come across this one?
No
Anything beyond a double sharp exists only in theory and not in practice. A quintuple sharp would raise a note by 5 half steps, so a C with 5 sharps would sound the same as F.
G#
No. On a certain note with both a sharp and flat, (G, for example) they are the same distance from G, but going in diferent directions. G sharp raises the note by one half step while G flat lowers the note by one half step. However, it is possible for a sharp note to mean the same note as a flat note. For example, G sharp is the same note as A flat. This is called being enharmonic.
G#
Its a kind of note in music. Its also in the G-scale of g sharp it is on the grand staff on piano.
A flat. Because this note is between G and A, you can go up from G (make it a sharp) or down from A.
A
C sharp
no, g sharp is the only "landlocked" note, which means it can only be called g sharp or a flat, not any double sharps or double flats.