Is the unofficial patch included in the GOG version?
https://www.nexusmods.com/skyrimspecialedition/mods/266?tab=description

If not and I decide to download it, can I use SKSE to arrange load mod order? Never played this before and would like to have a fairly vanilla experience but unsure of the modding options. Thanks.

I've not played Skyrim before and so was quite overwhelmed by the modding options so thank you for the info.

> You can use skse (devs made a version for Gog here https://skse.silverlock.org/)
but I encountered problems to enable just "SkyUI" and "Quality Map" mods

I posted few suggestions today to simplify the problem (link here : Skyrim GOG Suggesting an important lil' improvement for MODDING)
There is no file manager with Gog version (temporarily I hope), I never had to use any external software to mod oldrim (and I particulary dislike external stuff instead of a simple copy-paste+enable in a simple menu alike in many games),
with actual Skyrim SE GoG version you need to trafficking few files (in \appdata\local) after install/manage your mods with vortex mod tool (Has worked in my case). Also apparently many mods are not compatible...

> I vaguely heard somewhere "they" (GoG/Bethesda?Both? Idk) will find a solution for easy modding (there is 3 versions of the game immagine the headhache for modders lol), I hope this solution is true and will arrive soon :)

For your main question if unofficial patch is included..idk..I suppose no, personnaly I installed it anyway The game has not crashed for the moment^^.

Thank you for your detailed answer. I think I may well have a go at installing the unofficial patch as this is all I actually want for my first play through.

Np man, with pleasure^^
Precision : just at this moment I discovered something, I uninstalled unofficial patch it screwed language translation of some game+skyUI textual stuff, I play in french and many stuff were in english and some favorites group in skyUI were erased.
All has returned to normal after uninstall unofficial patch. After take a look on nexus this is a normal effect bcause this patch has no FR translation.
Edit : aahh I finally found it by google, works like a charm in GoG version, textures are translated too (pannels etc...) very rare high quality mod :p
Have GG thought Skyrim^^

I installed the unofficial patch via Vortex, and have the Gog version of SKSE. So far, it's working.

I use the unofficial patch with GOG's version. Besides having to use Vortex to install it, it works like a champ.