Wall of text incoming:
Hm, there are some studies, which show a high number of homosexual murderers in the group known as "serial killers", but the numbers are a) to small, to make a significant statement and b) serial killers are a relativ minor fraction of all murderers.
Source: http://www.adherents.com/misc/hsk.html
More basic information: http://en.wikipedia.org/wiki/Serial_killer
Btw. how do you classify someone as a homosexual serial killer? Is it enough, that he had one sexual encounter with another man? Is he out or closeted etc. It's kind of difficult to classify someone in this regard, especially in studies pertaining serial killers. Most of them are deeply disturbed individuals, who are not always honest, when they are interviewed, if at all they are. (the link discusses these problematics)
So, in conclusion, yes there seem to be a high percentage of homosexual serial killers, but it would be wrong to classify homosexual people as serial killers. And it is definitly wrong, to make statements, that homosexuals are more likely to murder. Especially, when you take into account, that prominent serial killers like Garcy, Dahmer etc. weren't part of what one could call the gay culture.
Almost all serial killers are male and white. Are all white men serial killers? So Conservapedia remember: correlation does not induce a causal relationship.
And nobody does explain things the way Conservapedia implies. (Btw. who are "evolutionists"?) That's just another case of "Lying for the Lord".
(Sorry for grammar errors; english isn't my first language.)
CAVE: I just followed the links of the quoted adherents article and one source is from the known homophobe Paul Cameron.