The gallery locator is actually a UUID unique to the tease so you can copy it but it won't have any images associated with it.
But it is possible to copy a gallery from another tease by copying the gallery object from the teases json file, adding it to your json file and uploading your json file ...

Working on my first tease atm, and upon creating a gallery I immediately got distracted seeing that its locator appears to be a unique hash, and I was thinking that might mean they could be shared! I was able to find some other ones around the forums, but inputting these in regrettably did not work ...

Heya! Been lurking for a while and finally decided to get around to making some teases of my own. Hopefully taking that first step and having an account will push me to be more active, but no promises lol