Written Cantonese Pronunciation 2 this is a follow up question regarding Cantonese Pronunciation. Previous question here.

Does anyone know how people from Guangdong, who would speak Cantonese at home but be taught in Mandarin at school, read in Cantonese? Would they know that 给 is pronounced as KAP or would they just read it as BEI?
Well, 俾 is BEI, and 给 is KAP in Cantonese pronunciation. In fact, 俾 and 给 also can be pronounced in Mandarin: 俾 is something like BI, I guess, and of course 给 is GEI.

So, they won't get confused, because they would certainly be taught that both words contain the same meaning but with a different pronunciation. In fact, I think 俾 is sort of like an unofficial word, which people usually use in texts/chats, and 给 is the official one. If you noticed, songs usually use 给 instead of 俾 :)