There is a help page for the question.
Can I migrate my ChatGPT Free or Plus account over to ChatGPT Team?
When you accept an invite to a ChatGPT Team workspace, you can join a collaborative workspace shared with other team members. If you also have a ChatGPT personal workspace (Free/Plus), you have 2 options
Related OpenAI pages
https://openai.com/blog/introducing-chatgpt-team
https://openai.com/chatgpt/team
ChatGPT Team Q&A
https://openai.com/chatgpt/pricing
Some information is found with the Enterprise pages
https://openai.com/enterprise-privacy
https://openai.com/policies/service-terms
https://openai.com/policies/business-terms
Active forum discussion about ChatGPT Team with real customers
Questions tagged: chatgpt-team
https://community.openai.com/tag/chatgpt-team
In reviewing details of the OpenAI documents noticed that there are two different pages for GPTs, one for ChatGPT and one for ChatGPT Team