Yes, it went down last week and has remained down the past few days. No idea why, but this has happened before and they did return after a week or two. Could be site maintenance, could be a billing issue with their domain provider. Just have to wait, and hope they come back online in a few days.
Its possible their business model has been adversely affected by problems over at Uploaded: if Uploaded is no longer cooperating, Gay69 is left with only Rapidgator. Perhaps they are evaluating new host options.