The username George was used a very long time ago, but his account was renamed to User:GTW-George so the username is fine to use if you want to. I will rename you if you prefer, though.
Gtabot uses a variety of different technologies and tools to perform its tasks. You used to be able to get full Wikia image dumps, then you could just use Manual:ImportImages.php to import them straight into the wiki. Otherwise I'd suggest using pywikipedia but that can be quite complex to set up and use.