Yes, a study after a gap is acceptable in Europe study visa but certain conditions keep in mind, as the past education history of the candidate should be strong. The student needs to have a degree in a certain field, not a diploma or something. Study gap is accepted up to 8 years but in some cases, it goes to 13 years. So the time gap is not a big issue, just candidates should have strong qualifications to apply for a visa after study gap.