I took a gap year after obtaining my degree. Can I still apply?

Yes. If you hold at least a French Bac+2, Bac+3, or Bac+4 degree accredited by the French Ministry of Higher Education, Research and Innovation, or at least a Level II qualification certified by the RNCP, you may apply to the Grande École Program (PGE) at the L3 or M1 level, even if you have taken a gap year.