The download of the full game at patch4 version is there (which is how I eventually had to obtain it)... but the patch is not there by itself. Neither is the hotfix from what I can see.
To illustrate, here is what I am seeing right now:
INSTALL GAME WITH GOG GALAXY
Baldur's Gate 3 (Part 1 of 15) 4.1.99.0983 EA 1 MB
Baldur's Gate 3 (Part 2 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 3 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 4 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 5 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 6 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 7 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 8 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 9 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 10 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 11 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 12 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 13 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 14 of 15) 4.1.99.0983 EA 4 GB
Baldur's Gate 3 (Part 15 of 15) 4.1.99.0983 EA 3.4 GB
Patch (4.1.90.2222 EA to 4.1.90.6165 EA) 4.1.90.6165 EA 38 MB
Patch (4.1.89.3171 EA to 4.1.90.2222 EA) 4.1.90.2222 EA 90 MB
Patch (4.1.85.1780 to 4.1.85.5707) 4.1.85.5707 42 MB
Patch (4.1.84.2021 to 4.1.85.1780) 4.1.85.1780 1 MB
Patch (4.1.84.2021 to 4.1.85.1780) 4.1.85.1780 4 GB
Patch (4.1.84.2021 to 4.1.85.1780) 4.1.85.1780 1.8 GB
