Are you setting the GPU on the launchers/Gog made Shortcuts, try setting on game executables?

Then you need to manually find the executable aswell and set the dedicated GPU to run it.

Currently don't have any GOG games that use launchers to show but from the screenshot you can see manually added games I/wife/brother tried galaxy with and so on.

WFM on a NVS4200M and NVS5400M

EDIT: Unless you turn off intel integrated in BIOS you won't get Optimus never to run every single game on dedicated gpu unfortunately

I think it is mainly (or only) for laptops, to give them an optional, lower powered, Intel graphics which saves battery time and runs cooler. The higher performance and battery hungry NVidia is activated for more demanding games, usually used only when your laptop is connected to a power outlet.

I don't see the point for desktop PCs, unless you have integrated Intel on the motherboard (are there such motherboards?) and then want to add a more powerful graphics card there too, but I am unsure if it automatically works with any secondary GPU (NVidia/AMD).

But isn't that a problem with the game overusing the CPU, not the GPU? Infinity engine RPGs (Baldur's Gate 1-2, Icewind Dale etc.) seem to have a similar issue, they always try to use your CPU (one logical core) to the maximum, even if you are merely staring at a menu screen. There I opted to run e.g. Baldur's Gate 1-2 with power setting lowered so that the game couldn't hoard too many CPU cycles.

https://www.gog.com/forum/baldurs_gate_series/100_cpu_usage_modern_computer_whats_up/page1

https://www.gog.com/forum/baldurs_gate_series/baldurs_gate_12_enhanced_editions_also_100_or_50_cpu_usage/page1

If there was a similar problem with the GPU, then the obvious choice would be to force vsync on somehow so that the game can't refresh the screen at insane framerates for no good reason. I had that problem with the Quake DarkPlaces mod, originally it would run modded Quake at several thousand fps on my laptop (making its fans scream at full speed), but enabling vsync fixed that and it would run at 60 fps, and the laptop was quieter and cooler.

When I tested various games, some GOG games actually ran better (or at all) on Intel HD graphics, while failing on the NVidia. For instance Gorky 17, with Nvidia I had severe graphics problems with the game (with 3D acceleration enabled in the game, not using the software renderer), while with Intel HD Graphics the game worked perfectly.

So when experimenting with different games and if you run into compatibility problems with some games while using the Nvidia, remember to check also how it runs on the Intel HD. You might be pleasantly surprised. With newer games it probably makes sense to run them on NVidia though (for the extra speed).

Optimus chips. Won't start a fuss outta nowhere but I had problem with these ;(

I remember you've said this before. Good thing about "dual chips", huh?
Wish there was a way to play some dedicated games only (cossacks etc) on integrated chips...

yes its only for laptops
nvidia looked in to a desktop version but scrapped the idea

Also you might have some problems trying to record games with the Nvidia GPU as the one driving said game. On an Intel HD, Freedom Planet in windowed would record normally, but on Nvidia, it would crash. But really, thank you for the reminder of that tip. I often forget about it; not so much nowadays that I got the hang of it.

Only risk I could think of is if you get the settings wrong, you just reset the bios. on PC's that's a pin you touch with pliers/jumper for a few seconds. For laptops... I don't know. That's sort of a problem with proprietary/miniaturized hardware, it's not upgradable and not really accessible. What you see is what you get (sorta).

Looks like I have the same problem with AoW:SM... Even if in the launcher there is an option to choose a graphic card, can't select the dedicated one...

Looks like running AoW:SM in windowed mode did the trick. Not my cup of tea though.

What happened to the visualizations in GOG advertising?

hahahahaha What?