Gjesterommet har sovesofaen.

Gjesterommet means the guest room.

It is built from:

• gjest = guest
• rom = room

Together they form the compound noun gjesterom = guest room.

Then Norwegian adds the definite ending to the noun:

• et gjesterom = a guest room
• gjesterommet = the guest room

So the whole word gjesterommet literally means guest-room-the.

Because Norwegian usually writes compound nouns as one word.

So:

• gjesterom = guest room
• sovesofa = sofa bed

This is different from English, where the same idea is often written as two words.

A useful rule is: if English has a noun + noun combination, Norwegian will very often combine it into one word.

In Norwegian, the is usually added to the end of the noun instead of being written as a separate word.

In this sentence:

• gjesterommet = the guest room
• sovesofaen = the sofa bed

This is one of the biggest differences from English. English says the room; Norwegian often says room-the.

Har is the present tense of å ha, which means to have.

So:

• Gjesterommet har sovesofaen = The guest room has the sofa bed

Here har means that the guest room contains or includes the sofa bed.

Norwegian often uses ha in this kind of sentence when talking about what a room, house, apartment, or hotel room contains:

• Leiligheten har balkong = The apartment has a balcony
• Kjøkkenet har vindu = The kitchen has a window

Sovesofaen is definite: the sofa bed.
En sovesofa is indefinite: a sofa bed.

So the sentence as written refers to a specific sofa bed, one that is already known from the context.

Compare:

• Gjesterommet har sovesofaen = The guest room has the sofa bed
• Gjesterommet har en sovesofa = The guest room has a sofa bed

For a simple description of what is in the guest room, en sovesofa is often more natural.

It is grammatical, but it can sound a little context-dependent.

Gjesterommet har sovesofaen suggests that both speaker and listener already know which sofa bed is meant. For example, maybe there are several pieces of furniture being assigned to different rooms, and this sentence tells you that the sofa bed is in the guest room.

If you are just describing the room in a neutral way, Norwegian speakers would often say:

• Gjesterommet har en sovesofa = The guest room has a sofa bed
• Det er en sovesofa på gjesterommet = There is a sofa bed in the guest room

So the original sentence is possible, but it is not the most neutral version.

The basic forms are:

• et gjesterom = a guest room
• en sovesofa = a sofa bed

So:

• gjesterom is a neuter noun
• sovesofa is a common-gender noun in Bokmål

Their definite singular forms are:

• gjesterommet = the guest room
• sovesofaen = the sofa bed

This is why the endings are different:

• neuter singular definite often ends in -et
• common gender singular definite often ends in -en

The word order is the normal Norwegian pattern:

subject + verb + object

So:

• Gjesterommet = subject
• har = verb
• sovesofaen = object

This is very similar to English:

• The guest room / has / the sofa bed

Norwegian main clauses usually keep the verb in the second position, so this basic pattern is very common.

Yes, especially gj in gjesterommet.

A rough guide:

• gjesterommet sounds approximately like YES-te-rom-met, but with a softer beginning than normal English y
• sovesofaen sounds roughly like SOO-ve-so-fa-en

A few points:

• gj is often pronounced like a soft y sound in many dialects
• jesterommet is not correct spelling, even though the pronunciation may feel close
• sovesofaen has all the parts clearly there: sove
  • sofa
    • -en

Pronunciation varies by dialect, but those rough versions will help you get close.