In theory its possible, in practice impossible.
I'm probably the one who have tried the most in all of TI to see if this is workable.
Maul just has no way of gaining enough hp to survive more than 1-2 rounds of enrage hits.
Everytime range works against you, and you get resist with TMR on GG on 7th hit, he goes. And you lose turns. And resists happens a lot even with a 98 potency teebo and a jyn whose potency is thru the roof and with tenacity down (yea so called 15% base chance of resist)
In practice you will near perfect range for it to be doable. I've gotten the point where I have GG down by 40% with Teebo Jyn Cassian Maul Bariss, but Maul only has about 150k hp at that point. (which wouldn't survive one full round from GG and droids) (note Maul has a lot lower dps than TFP .. so this would be roughly equivalent to an attempt with TFP instead of Maul of about 60% down)