My green card is expired do I need to have it for my citizenship

Local policy seems to vary, but in general USCIS will require you to renew your green card before they will process your citizenship application. In the past they were not so strict on this, but it looks to me like a revenue issue for the USCIS. Citizenship is an individual application, you will need to file for yourself. There are situations, such as when a green card holder files under the three year rule (based on an ongoing marriage to thier original sponsor) where it is required to show that the marriage is still ongoing and viable in order to complete thew citizenship process, but after 21 years this no longer applies to you.