ChatGPT
FreeRide for ChatGPT is in OpenAI's directory review. It comes to ChatGPT on the web as soon as it's approved, with the same projects you use everywhere else.
The ChatGPT desktop app, today
The ChatGPT desktop app's Work mode runs Codex, so FreeRide works there now. Follow the Codex setup →: one command in Terminal installs it for the ChatGPT app and Codex together.
Until then
Use FreeRide from any app that has it. Everything you save there is waiting in ChatGPT once it's listed, because every app works from the same FreeRide account.