assalam o alaikum.
I have opted
International Relation
International Law
US History
Criminology
Punjabi

Is it a good combination? Plus i wanted some suggestions regarding which is better among criminology and gender studies?

mery subject b same hain, books kis author ki use kar rahy ho..?

you can't opt criminology and international law simultaneously as both are in same group so gender studies is quite ON but I would suggest you to opt for environmental sciences instead of gender studies as it is more scoring than GS, GS is opinion based subject and your opinion may or may not appeal to examiner so technically you are at the mercy of examiner, while ES is more safer and scoring option.

I would suggest you to prepare from online resources, like wikipedia etc for IR and others as it is the most updated and recent data regarding the topics, the books of local authors available in the market are all sub-standard and the books by international authors are too expensive and comprehensive, so its better to read the most relevant stuff instead of going through 500+ pages of some xyz book. internet is a blessing for us, capitalize on it.

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Believe you can and you're halfway there. "T. Roosevelt"