As someone that got the Gardasil vaccine, I would support my son getting it once they know for sure it is safe for boys. The vaccine protects against 4 strains of HPV. Boys can get the HPV just as girls can. Two of the strains it protects against are also know to cause genital warts. So having my son get the vaccine would protect him from that and from potentially spreading those 4 strains of HPV to someone else.
Ideally he’ll never get any strain of HPV, so it won’t be an issue. The last time I looked at the statistics for HPV, they said that something like 80% of women 18–25 had some strain of HPV.