Canonically, the Gift was a one-time thing, rather than something that sits on your doorstep once delivered. It would probably also be easier for that creature to simply have someone give them the Gift (page 124) than to track down their home. Having said that, there isn't a lot that depends on this except for page 124, so if you feel like tweaking that in your game, go for it.

I wonder if a creature that missed out on the gift while travelling could gain the gift by going to their basin, it certainly sounds like a fun plot, a member of an exotic species trying to find a home they aren't sure exists, to gain a gift they aren't sure they will actually get.

The real answer on dragons is that I tossed in references to a lot of different stuff while I was writing the game to give GMs license to pull in whatever crap they want that doesn't violate the rules or feel of the game. In my own game, dragons will probably be from the Kaleidoscope, with different versions on different worlds, some of them sapient and some not.

Outsiders with limited volition vary a lot, but they always tend toward the nature of their world. The more time they spend with regular people and/or away from their world, the less they tend toward that and the more they become their own person.

I hadn't thought about Gods, but given what the Worlds Beyond actually are, I would probably rule that they can't get the Gift. Some of them are very miffed about that. The outsiders they create could be given the Gift, though.

Curses and Mystic Servitors do not have Sovereignty. They're expressions of their creator's emotions, power, and skill, and have to either do what they say (servitors) or do what they wish in the moment (curses). That doesn't mean you couldn't use the sort of techniques that create Mystic Servitors to build a sovereign being with its own full independence, but that's a more sophisticated ritual and not the baseline Mystic Servitor. Creating a sovereign being out of a Curse just feels like asking to be punched in the face by it. :)

Basically, the checklist to see whether something can be given the Gift goes like this:

• Can it hold a conversation with you?
• Can it choose what it does?

If both things apply, then yes.

Edit to add: Things that were dead (i.e. ghosts) did not get the Gift originally, but can receive it now.

What exactly are dragons? there are implications they are sapient, with their resentment towards the gift in one area of the world, are they from elsewhere in the Kaleidoscope? outsiders? or perhaps just Gods.

What limitations to volition do outsiders without the gift have?

Can a God be given the gift? presumably it would no longer be a god.

Can you give the gift to a curse?

do mystic servitors have sovereignty (presumably, you could give it that part of the gift if they don't, but do they have it naturally?)

Some of these feel like questions that would be best answered in play, as part of a plot, but others, like the mystic servitor sovereignty and level of volition of outsiders seem important to establish. I might have misread something.