My boyfriend was on probation for grand theft then he got pull over with stolen property can some one tell me how much time is he looking at his been in jail for 7 months already

A lot longer...

OJ Simpson was in jail over 2.5 years before he went to trial.

Your boyfriend is looking at serving his time (ignoring any good time on probation) however long his original FULL sentence was... then he's looking at new charges and time for the stolen property as a repeat offender when he violated.