Not really. If one of the other branches decides that a law is unconstitutional, that's pretty much the end of the issue as well. If the courts decided that operating Gitmo is constitutional but Congress decided otherwise, Congress could de-fund it and that would be the end of Gitmo. If Congress passed a law allowing indefinite detention without trial and the executive branch believed it to be unconstitutional, it could refrain from detaining anyone indefinitely without charge and there is very little anybody else could do to force them to do otherwise.

There are some circumstances where you can sue the government for failure to execute the law, but those cases pretty rare are hard to win. And even if you "win" all you end up with is a court opinion saying you won. If the executive subsequently says that it's still unconstitutional and they're still not going to do it, what then?

In practice this never really happens (because the executive pretty much never thinks anything is unconstitutional), which means there isn't a lot of precedent, but the courts don't really have any enforcement mechanism for their decisions against the executive other than reactions of the voters to the executive's defiance. If the executive is determined that something is unconstitutional and the electorate acquiesces then who is going to make them do it?