Oh well, I went ahead and published it.
dev.petuska.jekkyll:0.0.1 is now available on gradle plugin portal if anyone wishes to try it. Key features:
• Fully wrapped jekyll cli via gradle tasks and cli options
• Managed sourceSets with an option to merge multiple directories during builds
• JekyllServe task with gradle continuous mode and hot reload support (even on container mode)
I've started using it on my own projects and it seems to be working just fine without any native bundle or jekyll installations.