: Genisys is largely considered "legacy" or "deprecated." Most modern Minecraft: Bedrock servers now use PMMP (PocketMine-MP) or Nukkit .

Genisys was a popular server software for Minecraft: Bedrock Edition based on PocketMine-MP. It was designed to support newer features that the original PocketMine was slow to implement, such as mobs and specific block behaviors.

Genesis GV80 Software Update Issues and Experiences - Facebook

: In the Minecraft server community, these files are used to package the entire server software or individual plugins into a single executable PHP archive.