I really can't think of anything "unique" to CGA that she will need. I can think of some things that would be nice to have, besides a lot of underwear and nice socks.
A good, comfortable pair of running shoes (more crosstrainers for what they'll be doing). I don't know if they issue those anymore, they did for awhile, but that was after I was a swab.
Beyond running shoes, a good watch would be nice. For once they get in the fleet, a good multi-purpose folding tool, like a Leatherman would be nice. I like Swiss Army Knives, but my experience was that they are not good for ships. A good book would be nice, or a framed picture for their knick knack shelf.
When it's appropriate, an XM radio would be nice, or a Bose Wave Radio alarm clock (still have mine, still works great).
For sea services flashlighs are nice, knives are nice (must be FOLDING!), watches are nice.
You do not need to get them a sextant or dividers or Weems rulers...that will be provided.
They will be entering a proud service, if you can find something historic, that would be great. My parents bough me (after I was already a cadet), the old PO Box from the Academy (before the one I was using, PO Box 7055). It was a bank, but I really liked that kind of gift. Old books on the Academy from the 1940s would be nice, or old Coast Guard pictures, or Revenue Cutter Service artifacts or US Life Saving Service or US Lighthouse Service or Steamboat Inspection Service....these are ALL cool things that I cannot find anywhere, but would make excellent, although possibly expensive gifts.
Want a website to visit?
Look through that website...has some GREAT stuff.