How to collaborate with a specific MyGPT?

I have created a MyGPT that I have trained to some degree. I want other colleagues to train and configure it too. What options do I have?
I sure could share my account details with a colleague, but that does not sound good. Can I e.g. add a contributor to one of my MyGPT that I created?

There is no way to share configuring your GPT to someone else. One option can be to share your trained custom instructions to someone else and ask them to create a GPT and further train on top of it and share the final trained instructions