Heist Prep: Gruppe Sechs Gear Part 1

"If we're going in as a Gruppe Sechs team, we'll need an armored car to begin with... I know they do regular runs to The Diamond, but... nah that would draw way too much attention. Here, uh... give me a second."

- Lester's briefing.

Gruppe Sechs Gear Part 1 is an optional prep mission featured in Grand Theft Auto Online as part of the The Diamond Casino Heist update. It is a freeroam mission needed to progress The Diamond Casino Heist. Completing this setup and its second part, Gruppe Sechs Gear Part 2, allows players to use the Gruppe Sechs entrance disguise in the The Big Con Approach.

Overview
Lester informs the player that they need to steal a Stockade to begin the process of impersonating a Gruppe Sechs team. After a couple of seconds, He gives players a location of a Stockade under repair at an auto shop, which can be in places such as Los Santos Customs in Paleto Bay or Auto Re-Perez in Strawberry. Once there, the player finds that the Stockade is locked, and must find the mechanic that has the keys. However, the moment the player discovers this, they are attacked by the mechanics in the area. After killing the mechanic with the keys and losing their three-star wanted level, the player can deliver the Stockade to their Arcade, completing the mission.