Gorilla Glue #4 is making a name for itself as one of the most potent strains in the world. Gorilla Glue #4. It’s not uncommon for this strain to produce THC levels above 28% in optimal growing conditions. Great for those with severe pain conditions or folks looking to relax after a terrible workday, this isn’t a strain you’ll want to pass up. It may go by the name GG4 after a lawsuit from the makers of the actual glue, The Gorilla Glue Co.