What is a GTA 5 Boost? A boost in GTA 5 Online is when someone helps you increase your character’s rank or money quickly. Normally, you gain experience points (RP) and money by completing missions, heists, or daily activities. This can take a long time if you’re starting fresh or aiming for higher ranks. A boost, like the one offered by U4N, allows you to earn RP in a much shorter...