Subject says it all. I see that there is a lot of activity with these modules, and I suspect that the best results will be obtained by staying close to the actively developed code in the trunk, especially since I don't see any tags in there.
I just checked out your entire trunk, did a svn export, and uploaded all the files to my host. I did a /dev/build , and then made a new page of type ImageGallery. I uploaded some pics, and voilÃ , I was done! I'm impressed, this is the first time in a while that I've downloaded a module and it just worked.
Now, I get to find out if it will work just as well on my 2.3.2 live site as it does on my 2.3.3 test site.