Developer on Star Trek: Adventures - Jim Johnson, shared the following information decrypted from Section 31
Up to this point, the Star Trek Adventures RPG has focused on roleplaying in the Alpha and Beta Quadrants, and supported primarily Starfleet-crewed starships and game experiences. With the release of the Gamma Quadrant Sourcebook, the game line expands in two major ways.
First, we soar through the Bajoran wormhole and present the Gamma Quadrant, discussing many of the species that can be found there, with a special focus on the major antagonist of Star Trek: Deep Space Nine, the Dominion. The book also provides detailed information about the devastating Dominion War, and presents plenty of information for gamemasters and players wanting to run adventures and campaigns set during that turbulent time period.