...no, Gab is just another vulnerable landing spot (despite allegedly owning your their servers lol -- actually makes them even more vulnerable)
...they were also hacked and the entire database and platform was copied and handed over to the FBI by the "real" anonymous. Parler had a stupid registration process that required photo ID and proof of car ownership or some such shit so there is no hiding
I don't think that'll work... they'd probably get too much interference from their tinfoil hats. Not to mention, the fact that the risk would still be too large for "Big Tech" to scan for (and, thusly, steal) their brain waves.