poon-hill bro , If one has less than 2 Gpa at first , then College or University will send you  a letter .It says one is on Probation now. and one has  to maintain 2 GPA next semester or you will be out of College or University. After receiving less than 2 GPA on two straight semester , one will be dropped from college. None of the College or University will give admission again. It is very hard to get admission. There is only one chance that one can apply first college or University When one came to USA. But , admission is not guaranted.

Thank you.