Hi fredriklinder,
You should ask your friend what his 'source' was regarding the information he received (and then you might also want to be skeptical of anything else that he/she tells you). If you ever have any questions about the GMAT or the overall application process, then you should post them in the Forums here.
As far as the number of times that you can take the GMAT, you can do so up to 5 times in a 12-month period. For example, if you took the GMAT on April 1st, 2016... then you could take it up to 4 more times before April 1st, 2017.
1) How long have you been studying for the GMAT?
2) What is your goal score?
3) When are you planning to take the GMAT?
GMAT assassins aren't born, they're made,
Rich