All these colleges take admission from one or more competitve exam, so to get into any one of the them you have to qualift any of the few exams that they recognize:

1) Institutte of management technology, nagpur: CAT, CMAT, GMAT, XAT

2) goa institute of management: CAT, CMAT, GMAT

3) GITAM: MAT, GITM GAT, CAT, CMAT, GMAT, XAT

4) SIMSREE: CAT, CMAT, , MAHCET

Details on application you'll find in the link:

CAT: from august 2019 for 2020 admission

CMAT: 4th week of oct, 2019 for 2020 admission

GMAT: through out the year

XAT: available from 3rd week of august for 2020 admission

MAHCET: https://www.careers360.com/exams/maha-cet

GITAM GAT: https://www.careers360.com/exams/gitam-gat