If the abuser's gun is taken away, what will happen to it?
If the abuser has been convicted of a crime that involved the use of a firearm, or if s/he has concealed, possessed, transported or carried a weapon in violation of the law, it will be forfeited to the State and destroyed or possibly sold to a licensed firearms dealer.*
If you receive a protective order against the abuser, s/he can sell or transfer the firearms to someone who is lawfully able to possess firearms** or there may be the option of storing the guns with a local law enforcement agency.
* Va. Code §§ 19.2-386.29; 19.2-386.28
** See Va. Code § 18.2-308.1:4(B)