If you didn’t perform whudhu in the beginning of the ghusul, repeat the
thuhur four Rakah.

I did ghusl for jummah. and i realise that one needs to do wudu after ghusl for jummah. however at the time i forgot the ruling completely. do i have to repeat my prayer. And if i have to repaet it do i have to pray four rakat qadha for zuhr