Right…do you have four years each of English, Social Studies, and up to level 3 or 4 of a foreign language? It sounds like you have the math and sciences…but what about the others.
A strong student getting a GED doesn’t really make sense to me. I’d find a way to either fulfill the graduation requirements early (it’s probably too late to do that to graduate this spring), or look at some of the elective courses your school offers…and take those your fourth year.
Back in the Stone Age, I could have graduated from high school after three years. All I needed to do was double up English my junior year. BUT I was very very active in my high school choir and stayed in HS that fourth year…two choir periods, English, a law course/economics, PE (that was every day), some social studies, and a period as an office aid assigned to the choir director. It was a GREAT year!