Postby Astrum » 2017-05-05, 22:20
The main rule is that "g" in Norwegian is pronounced /g/, except before i and y, where it's pronounced /j/. ("Jeg", "meg", "seg" and "deg" are all exceptions to this rule.)
As for "høgskole", it is a remnant of a spelling reform in 1959. Thus, most public "høgskoler" are called "høgskole" (as opposed to "høyskole" – cf. "Handelshøyskolen BI", which is a private university college), even in counties where bokmål is the official written standard. However, because "høy" is a lot more common than "høg" (in bokmål) these days, most Norwegians tend to say "høyskole" even if the official name is "høgskole", i.e. "Høyskolen i Oslo og Akershus" instead of "Høgskolen i Oslo og Akershus".