Chances are if a guild is actually recruiting their core raiders based on gearscore, they're a fail guild.
Like Lore said, there are many possible options to explore when it comes to getting into a raiding guild, but it's just hard right now. If I were looking for a guild right now, I'd probably look for one that has been around for quite some time. If that guild has gone through one or 2 expansions, then chances are they know how to cope with this winding down of raiding by now, but that's not guaranteed.
Keep on trying, get some research done, really look into what guild is great for you. Gear, for the most part, shouldn't be too much of an issue right now since you can just completely blow through ICC with a good group of raiders.
"Kyle, this is the way the world works. If you want to find quality friends, you have to wade through all the dicks first." -Cartman