I would certainly ask the GC to present schedule options that would allow your dd to take AP physics. It may be that the GC is correct and moving her into AP physics will severely limit her other options, but your dd should have a chance to consider the options. OTOH, the GC may not have tried hard enough to come up with a schedule that would be acceptable with the AP physics. It can be tough, however, to get all students into their preferred electives.
Has she taken regular physics? Was she recommended for AP Physics?