The species is endemic to South Africa.

[2] The specific name, hewitti, is in honor of British-born South African herpetologist John Hewitt.

[3] G. hewitti may attain a snout-to-vent length (SVL) of 28–35 mm (1.1–1.4 in).

The tail, if original, is slightly longer than the SVL, but shorter if regenerated.

The dorsum of the body is light brown with darker brown markings, and the venter is pale cream.