गुड लक means खुशकिस्मती (khushakismati, khushakismatee) or सौभाग्य (saubhagy, saubhaagy)
Simply "Good luck" in Hindi is:
Shubh Kaamnaayein शुभ कामनाएँ
Synonyms
break, happy chance, fluke, good fortune, luckiness
Antonyms
Definitions
noun
an auspicious state resulting from favorable outcomes
a stroke of luck
an unexpected piece of good luck.