Yes I can help, I only worked it out yesterday after a couple of days almost tearing my hair out!
I see you have fixed it, but I will post for others who have this trouble in the future and do a search.
Create a folder called "uploads" in your _g2data folder.
Now in Gallery 2 you put this as a path:
If your name is Fred, and you log-in to Gallery 2 under the name Fred, then you put:
I hope that works for you.