I'm taking
Gavin because I think it's ugly and it seems to be rising a wee bit in popularity,
Gustavo because I just don't like it,
Greyson because it's too surnamey for my taste, and
Gideon because it reminds me of
Gideon Bibles.
That leaves:
GabrielGeorgeGianniGordon
"I like this phrase, 'pleasure calculus.' Is it truly as erotic as advertised?"
http://www.qwantz.com/index.pl?comic=599