Even if it’s possible to access pascal it shouldn’t be necessary to “do tricks“ to get around their deliberate exclusion of the language in the selection.
They are not singling out out Pascal.
As I pointed out the same tricks need to used for Rust and Groovy, which are more popular than Pascal. Especially Rust.
On a side note: The Linux project officially added Rust as a language that can be used Linux kernel development. Prior to that C was the only officially supported language.
Pascal will likely never be added. C++ will likely be never be added, and C++ is far more popular than Pascal. Is it a Linux project goal to hate on Pascal? No. Does Linus Torvalds speak disparagingly about Languages he does not like or understand? Yes. And he is not shy about that.
But I don't see language bigotry as the reason why Pascal is not in Gitlab's Hacktoberfest language drop-down list.