You can't use my music in GD right now because it isn't whitelisted. I would really to be able to use it. I have messaged some of the mods but I don't think they have seen it. If ANYONE know any good way to message them then please tell me or even message them yourself. THANK YOU
Gekkotsuki
You must get 'scouted' here (putting aside that you have to be put on the said 'whitelist') to be 'able' to allow people to use your music on Geometry Dash.
For 'further-information' about the 'scouted-status', consider 'taking-a-look' to the following link, which contains a whole 'guide' of it, among other information:
https://ornery.newgrounds.com/news/post/388624
(though it says that it's principally made for the 'Art Portal', believe me; it works perfectly fine for the Audio Portal as well, so don't worry.)
X-Irus
Thank you for the answer! But I am already scouted. It's only the whitelisted part that I have left.