This discovery of Gunns apparently joyful and public feelings about women and sexuality are, to say the least, deeply disappointing. The fact that it was out, on the internet, for more than a year before his attachment to the Marvel Cinematic Universe, and not even taken down or otherwise covered up until now, is even more so. Gunn was also publicly endorsed by Joss Whedon. Plenty of the people I follow are saying they will personally boycott the movie or calling for Marvel Studios to remove him from the project. Boycotting a major release in the MCU is not something I personally have the professional ability to do (providing information on whether a movie treats its female characters with respect is something I consider to be a vital part of this site), or something I feel I can, personally, advocate for or against to other people. The extent to which one can separate the artist from their work is a very personal decision that varies from person to person. Additionally, Gunn is by no means the only person who will have made Guardians when the film rolls into theaters in 2014 or who stands to lose their job prospects or salary should it fail.
As for calling for Marvel to remove him
I could honestly see that happening if it gets enough buzz. The release date is still two years off, and we live in a world where Brett Ratner is pressured into resigning from producing the Oscars for a gay slur, surely fans can hold Marvel accountable for the behavior of the directors they choose. Whether their opinions will be numerous to be listened to is something I cant be certain of.