Gorilla Glue is primarily used for bonding wood together although I'm sure the company has expanded the glue for different functions. To remove excess that has expanded from the seam while it is still uncured wipe with a damp rag. If it has hardened slice off as much as possible with a razor. There will be some residual glue on the surface. Depending on the material that was bonded a fine grit sanding drum chucked in your Dremel should work.
If the glue film that can't be scraped-off with a razor needs to be removed from a wood surface use a 150-180 grit sanding attachment and apply light pressure. You want to remove the glue only.
If the material is a type of metal attach a wire wheel or cup brush to the multi-tool and gently remove the dried glue haze.
If the material has detail or coloring that may get erased or damaged by using the previous two suggestions you will need to meticulously and patiently use a dental pick and a magnifier to scrape the adhesive coating away.