You'll have to check your state regulations... but why would you do it?
Roost shooting is considered unethical by 99% of all turkey hunters no matter what else they believe in. The whole allure of hunting gobblers is doing it on their terms, after they have flown down, are interacting with other birds and enlisting all of their senses.
"The joy of living is his, who has the heart to demand it." Teddy Roosevelt