How to get gpt to modify it's knowledge files

Is there a way to get a customgpt to modify it’s knowledge files or any external file such as Google docs? Id think actions would provide a solution but Im new to this part of it and so wanted to find out if it’s possible before I push into figuring out how.


I haven’t been able to modify knowledge files such that the mods persist into new sessions. One way to persistently modify external cloud files (e.g. Google Drive) is by using Zapier or Make (formerly Integromat)