Help/Advice

<p>Hello guys.I'm currently in the last year of my high school. I thought about applying for SAT but now i'm double minded.Should I apply this year in October/December or next year i.e after I complete my High School.Though, some of my mates told me that it will count as a Gap year.So is that an issue? What do you guys suggest? All sorts of opinions and advices are much appreciated! Thanks</p>