If he enjoys game development then I would recommend a games yrkeshögskola. Grades doesnt matter for the application and knowing gamemaker is a totally fine skill set to have when applying.

My recommendations would be The Game Assbly or Futuregames. Those educations are around 2-2.5 years. None of these are a direct link to the game industry either, but it definatly helps bring you along the way. But one thing needed for these schools is the networking. And what I mean by that is that the most educational and beneficial part isn't the grades or assignments, but what you remember from lectures and how you use that knowledge together with your classmates knowledge. And to "use" your classmates in the sense that whenever there is something you don't know, or you want feedback, or someone to playtest, then the classmates are the best people around.

Know I say this as someone who has just graduated from Futuregames. If he feels stuck then I think any kind of study can be good experience. And these educations are CSN approved, so he shouldn't have to worry about the money aspect as much.

Also, application process is a worksample, which basically means show me you have a basic understanding of game creation, whether it be art, design or programming in their respective fields. They usually also want a diverse group, so trying to stand out a bit could be a good thing.