The eligibility for appearing under the SC quota in NEET UG exam in Maharashtra with a Gujarat SC certificate depends on a few factors

Most states require you to have a domicile certificate from the state you wish to avail reservation benefits in. This means ideally, you need to be a Maharashtra domicile certificate to claim the SC quota in the state.

There's a 15% All India Quota (AIQ) for NEET UG seats. These seats are open to all candidates irrespective of their domicile state. If you have a Gujarat SC certificate, you might be eligible for the SC quota within the AIQ seats even if you don't have a Maharashtra domicile.

I hope it helps!