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i think the answer is "no", but there are other options.
The soundtrack is also available on Spotify!

Just search for "Overload Soundtrack"
I bought it on cdbaby, but it's a bit silly for GOG to be a "second class citizen" again.
Commenting here just to say, when they discount the Collectors Edition on Steam, they get to get the game, community DLC, and soundtrack for the price we pay for the game alone.

Just sayin'. shows
- CD Baby, but "CD Baby retired our music store in March of 2020"
-, but $19 ... oof
- Steam, $10, sometimes as low as $2.50, but ... it is not GOG. But at least Steam now allows buying the soundtrack without owning the base game.

If they sold the soundtrack through GOG I would have purchased it.
Some absolute bangers on this game's sound track and some really awesome composers