Greetings,
RGB Fusion is a feature supported on Gigabyte Motherboard's.  Its part of App Center.  If you use a compatible Gigabyte GPU, it too will be supported.  Note it says "synchronize with other AORUS devices".  To my knowledge, fusion is not a standalone feature of the GPU.  You have to have a GB motherboard with fusion installed for it to work.  Hope that answers your question.