OK, everything went fine, BUT

I put the headgasket upside down , noticed it when cranked the car dizzy and injectors plugged out.. Oil came out from passenger side.

So, Can I use the same gasket still, or buy a new one?

 

since it was already sealed unside down, i would just get a new one but thats me

 

HGs are single use items. It's cheap insurance to replace them when you remove the head.