Dried Gorilla Glue can only be removed mechanically by sanding, scraping, scratching or slicing through the glue with a knife, chisel, razor blade or other tool. Since Gorilla Glue is a urethane glue, its curing process is not reversible with a solvent like acetone or paint thinner.
If the glue is still wet, any paint thinner of mineral spirits will remove it. Gorilla Glue can stain skin and ruin clothing. Gorilla Epoxy and Gorilla Wood Glue can be cleaned off of skin with soap and water, but Gorilla Super Glue bonds skin instantly. The company recommends always wearing protective clothing and gloves with any of their glues to prevent skin exposure. They also recommend using safety glasses or goggles if there is a chance of eye exposure.