You don't want "gunk." But, you don't need filtration, you can let break material settle. After boiling and cooling let the wort settle and try not to get the cold break material into the fermenter. Once fermentation is complete let the beer clear before racking to the bottling bucket, again try to not transfer any of the material at the bottom. There is debate about whether or not the cold break is good for the fermentation, I side with avoiding it going into the fermenter as much as possible as it is associated with some off flavors and lowering aging stability.