This exact situation happened to me in a PTQ a few years ago. At the time
I worried immensely about the implications of coaching, but I figured that
the answer to the question was just No.
The player didn't ask “Can I target my Ghost Quarter with itself?” to which
the answer is “Yes.” (and hang around the table for the impending jusge
call).
I think the question actually asked is essentially the same as “If I target
my Ghost Quarter with itself, can I go fetch a Plains?” to which again the
answer is obviously no with no accompanying feelbads.
Paul Smith
paul@pollyandpaul.co.uk