Gavin Verhey himself noted on the first look stream that If you transform this, you are not going to lose. This isnt particularly surprising
You'll want to seek the long game with Death Toll don't be too aggressive, set up your defenses, and show opponents the futility of messing with you by simply bringing dead cards back from your graveyard
Swords to Plowshares has been around since Alpha and is still the champion for sending creatures into exile
The upcoming Foundations Commander decks are mono-colored, further simplifying the approach for new players
Additionally, as this Gideon has no means of protecting itself and it hinges on an opponent having a board state, you need another means of protecting it before an opponent simply uses their creature to take Gideon out of commission
Then, some mass Mill effects like Traumatize can help make sure you have excess cards in your graveyard in case you get dealt damage