No. There is not a single serious scholar who has even canvassed this possibility. Not least because John repeatedly identifies himself in the Gospel, as ‘the beloved disciple’, talks about why he has written certain things and excluded others, and his objectives in writing them. Likewise also throughout the 1st Epistle of John which in some respects in possibly a ‘covering letter’ to a copy of the Gospel itself.
The idea circulating on the Internet now largely originates with an RE teacher at a Catholic girl’s school in Staten Island in 1989 and resurfaced when Dan Brown’s Da Vinci Code popularised the Mary Magdalene conspiracy genre.