I see the term 'ayibobo' can be used for "halleluia or congrats" My friends say I shouldn't use it because it's voodoo related. But my dictionary made no mention of any restrictions for this term.

Yes, it's Halleluiah, Bravo, Congrats in voodoo circle.  It's not for Christian use.  Someone might kicked you out of church if you start screaming Ayibobo!.  They'd think that you are possessed by a loa :)

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words