CUET PG is the best way to get into a government college for any masters program but if have missed it there are other options like:

1:NIMCET= Enables MCA admissions at top NITs and two IITs across India .

2:State entrance exams also help  in this

3: University specific entrance exams like JMI Entrance test , Aligarh MU entrance test .

4: Merit based admission like on (CGPA of BCA or BSc with maths) in MCA is very rare but possible at some government institutions, admission via  merit  is  concentrated mostly with private institutions