I am a SC candidate from the domicile of Kerala,my NEET 2018 score is 479. Do I have a chance of getting any govt medical college under AIQ

Lets first look at what was the cut off in previous year (General category)
AIQ Cut Off -

Govt. Medical College, Kozhikode - 632
Govt. Medical College, Kottayam - 599
Govt. Medical College, Thiruvananthapuram - 614
Govt. Medical College, Thrissur - 595
Govt. Medical College, Ernakulam - 589
TD Medical College, Alleypey - 593
Govt. Medical College, Kollam - 563
Govt. Medical College, Manjeri - 585
Govt. Medical College, Yakarra - 581
State Cut Off -

Govt. Medical College, Kozhikode - 583
Govt. Medical College, Kottayam - 597
Govt. Medical College, Thiruvananthapuram - 608
Govt. Medical College, Thrissur - 590
Govt. Medical College, Ernakulam - 583
TD Medical College, Alleypey - 583
Govt. Medical College, Manjeri - 584
Seeing at these cut offs and keeping in mind, cut off varies from year to year, I would suggest you to score 600+ . 600+ would be a safe score with which you can obtain a Govt. Seat in Kerala under General/Unreserved Category.
For complete details visit - https://medicine.careers360.com/articles/neet-cutoff-kerala

From these records, and with your marks it's highly possible for you to get a government seet

Good luck