Is it OK to nail gun SLP roof louvers also known as slant back roof louvers?

Yes, as long as the nails fully penetrate the underside of the deck and industry standards are followed.

Make sure the nail gun pressure is regulated such that the head of the nail does not penetrate the base material of the vent. Also make sure the vent is installed according to standard industry practices, and all other standard installation instructions are followed. It is important that the nails fully penetrate the underside of the deck.