Many schools, including Baruch, start reviewing apps in early December. I took mine at the end of October, giving me the most time to prepare, and allowing me to retake in November if necessary (you can only take the GRE once per calendar month). It takes 2-3 weeks for ETS to send your scores to you and the schools you chose.
This year the Math subject test was Nov. 11, but you don't get the scores until Dec. 15, so I decided it wasn't worth it (since this is past the deadline for many schools).