how many hours ahead is gmt of est
GMT is 5 hours ahead of EST, so it would be 8:30.   If you are asking about 3:30 AM EST, it woul dbe 8:30 AM GMT; if  you are asking about 3:30 PM EST, so 15:30 EST, it wâ¦ould be 8:30 PM  GMT, so 20:30 GMT.