How many frets up do you have to move a G, till it becomes a C?

G-G#-A-A#-B-C = five. That means 6th string,8th fret, 5th string 7th fret and 1st string, 8th fret. the triad, for a C chord is C - E - G, so you have one open string to play, if you don't want to barre.