I like #2 especially. Having the wheel be in the G gets your attention right away, and having the G be a little better than the rest of the letters makes it stand out just enough. I like this design a lot.
"My predominant feeling is one of gratitude. I have loved and been loved;I have been given much and I have given something in return...Above all, I have been a sentient being, a thinking animal, on this beautiful planet, and that in itself has been an enormous privilege and an adventure." O. Sacks