Just for your info... Some years ago the lone captive one in NZ was in my care for a few years before I passed it on. They need very cold, windy, wet conditions (I lived in such as area) to thrive, they are built to endure those conditions (why they have such cryptic colouration, to allow extended day-time exposure for sunbasking) but are not equipt to deal with mild conditions. Originally a number were collected to be captive bred at a government facility, but most died rapidly. The few young that were born all died within months with severe bone deformities. Only one adult survived captivity, lasting for several decades, before one keeper neglected to give it unfiltered natural sunlight and it too soon died. Nice to see much 'leave them be' sentiment here - I can honestly say this in one animal that will disapoint in an enclosure.
P.s. there is a gecko further south in Patagonia, and even in NZ M. nebulosus ranges slightly further south than this guy, BUT it is now in its own genus Tukutuku so may yet be the southern-most gecko genus!