Nope! I actually just had this discussion last weekend with a former employee of the GF Spa. They do not pierce for liability issues. You could always take her to the Florida Mall, there's a couple places there that do piercing.
They also do not wax or razor off foot callouses for the same reason in case anyone ever wonders about that. (Actually using a razor on callouses unless you're an MD in the State of FL is illegal.)
Personally I think I'd do it a couple months before the trip, and let her pick a pretty pair of earrings while she's there for the first pair to change into from the initial studs.
Anne