recover mail account password

I have a gmail account which my apple mail program accesses great. I now want to access it from my iphone. But, I no longer remember my gmail password. Is there a way to recover that password from my ibook? The password is encrypted when I go to mail account information.
I have already tried the recovery process through gmail but I no longer have the email non-google email account that was the reference email for my gmail account.
Thanks
Eric