Hello Aspirant ,

Yes , You can get into IIM with 4 years of gap provided you clear the cat exam and have a good enough academic record to get selected for it , there wont be any problem at all  and you wont be discriminated on the basis of gap years, but you will have to justify this 4 year gap to interview panel and convince them about this , if you succeed at convincing them no one can stop you from getting the admission.

If you worked during the gap year it will be beneficial for your resume .

For more details about IIM visit :

https://bschool.careers360.com/articles/iim-admission-criteria

Hope this helps.