Hi all,
the 5024 update for Postal 2 should be available on GOG as shown on the patch notes.
However, in my (freshly installed) game's main menu the version is "GOG-US-5023".
How so?

EDIT: I ended up buying Postal 2 + Paradise Lost on Steam, finding out that the version shown there is 5025, a "recent" (almost 2 months old) update, still not available for the GOG version.
Also, there is an option for subtitles on Paradise Lost. This option was added with the 5023 update, but the GOG version, despite being (at least) the 5023 one, does not contain that option.