The fact is Republicans are indeed present and have access to all of the supposed "secret" impeachment hearings and/or interviews. And this is the reason why they're so upset and rageful, because of what they're learning from these hearings. The testimonies are all corroborating what the whistleblower reported. Specifically, what William Taylor had to say was incredibly damning, all but justifying and assuring Trump's impeachment. As reported, Taylor's testimony "even led to gasps in the room" as "the gravity of the moment and the realization of what is at stake in the impeachment probe was palpable in the room." An anonymous Republican present succinctly said, "This isn't good."
It's after this bombshell testimony that Republicans lost their sh*t and, as they usually do, decided a diversion was needed, something theatrical and over-the-top to distract their Fox News base. Answering the call, Gaetz stepped forward with a genius plan.
Oh, and as for their second claim about the made-up rules, the fact is they wrote the rules! Republicans are very good at one thing, hypocrisy. They love rules as long as the rules don't apply to them. Same apparently goes for laws. Similarly, they despise deficits, until their guy's in charge and then deficits don't matter.
But as a rule, the more you see Republicans pissed off and acting out, the more certain that Trump is doomed.