Are they making a gray hulk movie?

As of my last update in September 2021, there is no information about a Gray Hulk movie in development or production. The movies released so far focus on the traditional green version of the Hulk character, and there have been no official announcements from Marvel Studios or other sources about a gray Hulk movie.

It's important to note that film projects and release dates can change, and there may have been developments since my last update. For the most up-to-date information on upcoming Marvel movies and projects, I recommend checking official sources such as Marvel's website, social media, or reputable entertainment news outlets.