If after performing Ghusl, one remembers that he had to cut his fingernails and toenails (before Ghusl), then he did it after Ghusl, is this Ghusl valid?
الجواب حامدا و مصلیا
Yes! Cutting one’s fingernails and toenails after Ghusul has no effect on Ghusul. Ghusul is still valid.