I've heard that Marriott is not good about comping status, but in the economic climate we're in and the many golds and platinums who have jumped ship to Starwood and Hilton, I think it's worth a try. I would call Marriott Rewards customer service, ask to speak with a supervisor, and explain your situation. They will probably ask for statements of the your Hyatt and Hilton stays to ensure they will get your business. You should have a fair chance at MR comping you to gold as long as you stay x nights this year. I have not personally tried this with Marriott, so I can't give you an absolute, but I think they will work with you. Good luck!