Democrats have done quite a bit of gerrymandering as well. Hardly a one sided club.
It was going on before there even WAS a Republican party:-)
Both sides do it, every single chance they get, and as much as they can get away with. Always have, always will.
That’s why the phrase “Partisan Gerrymandering” cracks me up; there ain’t no other kind, it’s like ‘wet water’ or ‘dishonest criminal’.