pre-spawn/spawn bull gills
My sons and I usually find the gill staged just off spawning grounds at about the time we get the first run of big specks on the spawning turf. About the time the second run of speck comes in the first batch of gills are coming in to create some beds. By the time the last batch of crappies is spawning the gills are really getting into the swing of the spawn.
As far as time frame goes,it varies, but up here in northern and central Michigan the crappies are starting around the first of May and rapping it up around the mid June. The gills on the other hand are really just getting started around the first of June and may extend well into July. Of course it all depends on the weather. If it is a long cold winter with late ice it might all start a couple weeks later or vice versa on an early spring.
It is not about the equipment you have to use,
It is about how you use the equipment you have. :D