can the gpu be damaged ?

Possibly, though it is likely to be more the power supply failing to stop the sudden change in power to the graphics card. It is probably going to be fine if you have a quality psu powering your graphics card, but nothing is for certain, how often do you get these outages?
 


it just happen just now just 1 moment ? did my gpu is ok ? i got a corsair vs550
 

Probably, was your pc on at the time? or off?
 


its on :/
 


 


im afraid it damaged my gpu