My brother in law has gold passes and wants to give me 3 of his flexable bring a friend but he cant go can i use them without him being there?

Hi Mystic - The Season Passholder must be present with the guests for the flexible Bring-A-Friend tickets to be used.

Yes

And if there are three I believe there also has to be three pass holders present. One for each free one

No who ever has The pass has to be present for the flexible bring a friend pass, sorry