The dominant of C♯, voiced across all six strings at the 4th fret.
Index finger barres the top, D and low E strings at the 4th fret
Load G♯7 onto an interactive fretboard, hear every note, and build it into a progression.
Play G♯7 in the Studio →A G♯7 chord contains the notes G#, D#, F#, C. It is built from the dominant 7th formula 1 - 3 - 5 - ♭7, with G# as the root.
They are four frets apart on the same string set, so treat it as one slide rather than two shapes. Keep the index finger lightly on the strings as you move and let it arrive as the new barre. The hand never really leaves the neck, which is what makes the change sound connected rather than stitched together.