This Beast GTS is a vehicle side mission in GTA 1 during the Liberty City level Gangsta Bang (Level 1).
Mission
Enter the blue Beast GTS in southwest Island Heights to find out that two guys tore up a Cat House in south Island City and that Bubby wants them killed. After killing them, you need to escape to a garage in central Brocklyn Docks before the cops arrive (which they never do unless you obtained a wanted level from the killings).
Reward
The player is awarded 60,000 points (60,000 x Score Multiplier) and a +1 increase of score multiplier for succesfully completing the mission.
Text Strategy
BEAST GTS:
Follow roads S/W, W big road, S over bridge, W big road before bridge.
Run over guys.
E, S over bridge, W small road.
Follow into Garage. END!