i have the seadek, no pictures as this time but I can tell you I love it!!! I have had it on two boats swim decks. My first was an I/O with just the textured fiberglass deck that needed it. I loved it so much it was the first thing I did to the new boat. Much better than the hard black rubber that gets very hot in the sun. In 1 1/2 years did not have a problem with the material peeling up.
I've had quite a bit of GG topside for I think 7 seasons now. The white background is starting to come off, but otherwise nothing wrong with it. Great stuff.
It's a matter of style imo. I have had both and the seadek looks a little better on my all white boat. The gator grip seemed a little "busy" and the pattern clashed with my boat. Prefer the Seadek....