Before providing a review, it's important to be clear about what this likely refers to: is generally known as a cheat menu / mod menu (often for GTA V), and a "Fivem download" version would imply using cheats or exploits on FiveM (a popular multiplayer modification for GTA V).
It looks like you're asking for a of something called "Kekhack Fivem Download." Kekhack Fivem Download