Word of caution: many electronics are not designed for the shorts between connections which occur if you hot-plug one of those.
The short-proof approach/strategy would be to use small magnetic pogo connectors, but I really wanted to maintain compatibility with the GC Nano!
There are lots of connectors out there where the pins never short. The tricky thing is finding ones that can be plugged and unplugged often, while still being small. I've misused USB B connectors for this purpose; it's not common enough for someone to have the wrong cable to plug in, yet very easy to solder and to get the parts. There are also some circular connectors (M5, M6) where the connector on the device is decently small and the bulk tends to be on the cable side.
With a small crimper there are even more compact options which still handle many mating cycles, like Samtec's various Tiger Eye product lines.