The G sharp minor chord is most often played as a root 6 bar chord, starting on the 4th fret. The chord itself contains the note B as the flat 3rd, which can be played on the open 2nd string. Therefore, G#m can technically be played as an open chord (see first shape in image below) (see first shape in image below). However, the G#m chord is more commonly played as a bar chord. G#m is the relative minor of B Major and is also found in the key of E Major. As those two keys are relatively popular, G#m is a somewhat common chord itself.
Here is a shape for the A flat / G sharp minor guitar chord. This chord diagram uses one of the more common bar chord voicings. The lowest root note of this chord is the Ab / G# on the 4th fret of the 6th string. When a note can be called by more than one name, in this case A flat or G sharp, that note is said to be enharmonic. If you need more help on playing bar chords you can always go to the bar chord lesson.
