JAAHAS: have all the relevant fixes without any mention to Bethesda/Zenimax in splash screens or credits?
If I'm not mistaken the changes to the Fallout installers aren't of that nature.
I have only had the time to look at Fallout 1 and from what I can see the following changes were made:
- The "semi-official" patch 1.2 has been applied.
- A wide-screen patch has been applied. -The patch can be customized and probably even removed.
If you want to have the most up-to-date version of the game you may want to download the unofficial patch 1.3.x.
Edit: And since GOG's installers are still UK versions you may want to apply the Children-patch first.
(Note that I have just purchased the game for the first time. So, I can't promise that I'm correct)
Edit 2: I think the following post is also relevant:
http://www.gog.com/forum/fallout_series/fallout_new_version_does_not_work_with_dosbox_turbo_on_android/post2