Gorilla glue is incredibly strong, but has one flaw. It foams up while cuiring.
I used it for laminating bows in my early years, and it worked, but the glue line had to be PERFECT, and the clamps had to be really tight and close together. The foaming results in any tiny gap pressing apart, and the foam will break down under flexing. Any glue line that is anything thicker than almost invisibly thin, hairline, will fail over time when flexed a lot.
For a splice, I would say yes, use it. Just do your best work with the tools, and really get the splice flush. Then make sure no part of the splice is in the bending limb.