There are a few US MBA programs offering spring intake - but they're mainly the one-year or accelerated programs, like the one at Thunderbird and the one at Cornell Johnson.
But if you're taking the GMAT in February, you probably will not make the application deadlines for spring admission.
Here is a list of MBA programs that offer admissions in spring semester:
Boston University School of Management
Frank Z Garb School of Business, Hofstra (Rolling)
GSB, Gonzaga University
La Salle University
Pace University - Lubin School of Business
Thunderbird School of Management
University of Massachusetts