The name originated in paedophile internet communities and paedophile activist groups. Some paedophiles/epheophiles who use the word do it to stress the notion that their attraction to minors is not soley physcial but but also includes an emotional aspect.
While there are some GirlLovers who break the law and engage in sexual activities with minors, there are many who remain celibate (at least in regard to the objects of their attraction.
Rusty is a 17 year old who is primarilly attracted to girls between the ages of 9 and 11. Therefore, he is a GirlLover