I've grown out some GG#4 crosses, but nothing from an S1 of the GG#4.
Locktite by Red Eyed Genetics is an incredible cross of GG#4 X Mt Rainier, but the only thing it has in common with the GG#4 is the trichome coverage and high thc.
Tony Greens Tortured beans has a Gorilla Bubble = GG#4 X Sour Bubble back crossed to the Gorilla Glue #4 once, twice, three times, and with his back cross 4 coming soon, the Gorilla Bubble BX4 will be in the upper 90 percentile Gorilla Glue #4 genetically.
Gorilla Bubble is an awesome strain that has the pain fighting qualities of the Sour Bubble and the drool inducing power of the GG#4. It's also had phenotypes that have tested in the 30% total THC.