decrypt aes256 encrypted file without gpg-agent

[Fourhundred Thecat]

 > On 2020-06-28 21:47, Ingo Klöcker wrote:
> On Freitag, 26. Juni 2020 09:33:15 CEST Fourhundred Thecat wrote:
>> I have file encrypted with symmetric cipher (aes256) and not signed.
>>
>> How can I decrypt it without using gpg agent ?
>
> Use openssl. Or another simple program offering symmetric encryption/
> decryption with AES.

how can I use openssl, to decrypt a file that has been encrypted with
gpg (symmetrically, aes256).

Can openssl read the gpg format/header ?
Can openssl decrypt gpg file ?

thanks,