the code is open source.... you will be able to get it, and may other similar gallery apps from any reputable php site. this one does run on Mysql, so for a lot of people it's not the ideal solution.... I have another one here, that actually runs on it's own internal Database.... It's also very nice in that it has the ability to upload batch groups of pictures from a URL on the net.....
now you guys know I can not promise not to periodically completely accidentally screw up the database, or drop a screwdriver on the middle disk of a 3 disk raid0, in my server.... or some such fatal anomaly......
you should be able to post in either of those two, tel me investigate....