Why did you say "republicans?" Both parties gerrymander from california and maryland to north carolina and florida (before the court ordered redistricting). Calling people out ISN'T and SHOULDN'T be restricted to party. Both parties use the system.
California has a commission that is at least something, and could use improvements. If you're going to even compare that state's maps to places like NC, then I'd like to see some analysis on that first. Florida's maps were redrawn in late 2015
(state senate/Congressional, State House wasn't challenged). Each party could probably always find an issue/bias with maps drawn by almost any commission/system we can come up with, but the point is to try and keep it as balanced and fair as possible. Maps from states like Maryland, North Carolina and Pennsylvania are abominations and the whole practice needs to stop.
Sure, both parties do it, but it doesn't make it any better. Trying to justify Republicans right now though is one hell of a stretch considering just how many state legislatures they control and how many maps they diced up in 2011-2012. It's not even close. So yes, I am going to continue to absolutely lambast your party over this until it's fixed. If Democrats go buck wild like this in the future, I will do the same to them.
And it's for this reason that awarding electoral votes by Congressional districts is an awful idea. It would spread the disease of gerrymandering to presidential elections. As if things were not bad enough already.