I just received two geckos earlier this week, the temps were in the high 30s between the breeder and me. She shipped using an insulated box and a heat pack. My girls were fine I'm glad I didn't have to wait until spring to get them.
Well really it is on preference on the person and receiving the gecko's also.It varies from breeders and if you do decide to ship or receive a gecko in cold weather cold weather remember these tips from one of Marcia's thread. http://geckoforums.net/showthread.php?t=14464