This sentence is grammatically CORRECT
1. We bought the gift for Gabriel.
2. I tell the truth to my parents.
3. they give homework to the teacher
4. I bring a sweet bread to you.
5. You write a letter to me
Los amigos son simpáticos.
Los because you can see amigos has an O and not an A ; also simpáticos has an O and not an A which indicates it is masculine and Los is masculine, Las is not
#5 está
#6 estamos
I recommend using spanishdict for these types of questions.
