if you can really prepare for GMAT for 2 months intensively, I think you can get 700 or above
I knew a guy whose TOEFL was 600, his definitely cannot get 720 in GMAT when he took TOEFL, and he also quit his job for preparing GT
Relative speaking, reading comprehension needs a good foundation of English, it can not be obtained within 2 months
However CR and SC are easier to improve
It is difficult to say, however, i believe you can . I prepared GMAT for about two
months, fifty days to be exact. I got 730 at last. If you keep five efficient hours
each day, that's enough.