Range comparison, re-entrant ukulele tuning (high G) versus Low G for typical soprano ukulele. You can see that a low G string extends your range by five extra notes (G, Ab, A Bb, & B).
(Note: Range mapped onto a piano keyboard because, even if you don’t play, it’s nice to see relative positions laid out on physical objects — we’re visual critters after all. The black keys are the sharps and flats.)
(graphics from a never completed video I’d begun over a year ago. Sigh. Perhaps some day… )