I think you could use it if you wanted to, but it is closer to "skilled" than to "being good at something". You might be interested in this thread: adept vs. skilled
I was adept at needlework when I was in high school.
I was adept at setting up chemistry experiments and doing computer simulations when I was in high school. (I'm not quite sure about the wording of that one, having been pretty useless at science and maths really)