Had a Green Card, Got Married, and My Green Card Expired

[AMFL1]

I received my permanent residency card in 1982 when i was 6 years old, i've been living in the u.s since and in the same state in 2000 i got married to a u.s citizen and now have a couple of kids and am still married to same person, recently i found my permanent residency card and it was expired. has been for more then 1 year what do i do next?

[Mr. Knowitall]

You file form I-90 to renew a 10-year Green Card that is about to expire, or which has expired.