If we agree that there is only one God, then there is no God of the bible, or the Torah, or the Quran, or any specific one, there is just God.
If a non-Christian prays to God, how does the one and only God, not hear that prayer?
from page
The God of the Bible is the God of the Torah, but many who worship God are not Christians (most Jews for example). God hears all prayers, but He will not heed those who pray to "gods". The Bible contains a story of a prophet putting a pile of wood out and exhorting them to pray for their god to burn the pile. When they fail, he douses the pile with water and beseeches God to set it on fire, at which time it is totally incinerated.
The main point being, that if prays to God, God listens, if one prays to some idol or other false god, noone hears the prayers.