You can use forms of get instead of forms of be as an alternative way to formulate the passive voice. Passive voice clauses constructed with get are less formal than those formed with be, but otherwise have the same meaning.
However, you can’t use get for stative uses of the passive voice, where the passive indicates the result of an action. You can only use it for eventive passives, where the passive indicates an action. Here are examples of the stative passives where get is not grammatical:
100 votes are required to pass the bill
* 100 votes get required to pass the bill
He was rumored to be a war veteran.
* He got rumored to be a war veteran
The plums were intended for breakfast.
* The plums got intended for breakfast.
A vacuum is abhorred by nature.
* A vacuum gets abhorred by nature.