The domain transfer is easy enough. Just follow the instructions for an Account Change.
As for the transfer of the GoCentral package, I do believe there is a way to do this but it would require calling into to GoDaddy support for assistance. Don't quote me but I believe there's a fee for doing this and you'd have to purchase a new GoCentral plan in the account you're transferring to. Again, I could be off on that so you really should call customer support for a definitive answer.
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