Is it the right time for me for giving a GMAT.

Hi I have a work experience of 1.5 years(till date) which includes 6 months of work-ex in a BPO(Tech-Support) and 1 year in a AON (on the technical side). I am really confused as I am not sure when to give GMAT as I want to get into the 2013 session, keeping in mind I am yet to start with my GMAT pr...