WiMaiRi
Gild can change his gold such that a spiritual being can't get through it? Unless he is using haki it is impossible and never have you mentioned him using haki. If you are writing a story make sure to tie all the ends and give explanation for all your logic in your chapter itself and never expect the reader to know anything. Treat as if you are writing it for someone who has little to no knowledge of what you are writing about.