To begin the quest, enter The Think Tank and initiate dialogue with Dr. Borous. Following all speech paths, he will mention his pet dog, Gabe, and his experiments upon him. After this talk with the doctor, head over to Higgs Village, which is in the south of Big MT. When the player first enters, the objective is the house to the left on the far corner; House #103. Behind the house is a doghouse with the letters "GABE" spelled out below it on a mat. Gabe's bowl is also on the mat, which the Courier must take.
If the player has taken the Wild Wastelandtrait, a unique miniature deathclaw named Stripe will be inside the doghouse. His name will be shown on the doghouse, and the letters from Gabe's name will be scattered on the ground. Stripe has the melee damage and health of a full sized deathclaw alpha male. He will only pursue the player to just near the fountain, then run back behind the house. Stripe will also appear after this quest has been completed if the player switches their trait to Wild Wasteland through the Sink Auto-Doc after retrieving Gabe's bowl. Also, a "chicken leg" will appear at the door of the doghouse.
The Courier should then proceed to the X-8 research center and go through the main quest line for this area, X-8: High School Horror!, until they reach the Residential Test Facility portion of the quest. Once the Courier activates the Residential test, the Courier will encounter a simulation of a house with a garden, and a unique cyberdog named Gabe will be patrolling the area. You must search the digging areas, which have quest markers pointing to them, until you find an audio sample called "Gabriel's bark". Dr. Borous will be grateful if Gabe is not killed, although utilizing proper dialogue when speaking to Dr. Borous will result in positive responses even if he is killed. Once the Courier finds the audio tape, some robo-scorpions will appear and proceed to attack Gabe. It is possible to save him, but player must act quickly. Even if you save Gabe from the robo-scorpions, he will still remain hostile to the player.
When the Courier returns to Dr. Borous and gives him the dog bowl, he will reminisce about his dog and thank the Courier for killing Gabe, as he believes it saved him the trouble. If the player kept Gabe alive, Dr. Borous will thank the player for sparing him. For Dr. Borous to feel remorse for the horrid experimentation he did on Gabe, the Courier must pass a Speech check of 45 or have the Animal Friend perk.
If the player suggests to Dr. Klein that he consult his colleagues when confronting the Think Tank near the end of the add-on's main quest line, completing this quest and causing Dr. Borous to feel guilty over Gabe will incline him to vouch for the player.
If Dr. Borous was caused to feel guilty over the treatment of Gabe, the Courier may return, each 24 hours thereafter, to ask Dr. Borous about torturing creatures, Dr. Borous will insist it is "research" and give the Courier assorted items dropped from dead cazadores and/or night stalkers.
This is one of the quests that can help peacefully end the quest Old World Blues and keep the think tanks alive.
The game code contains dialogue suggesting this quest could end positively or negatively depending on whether Gabe dies or not (Borous will give you animal eggs instead of dissected parts, and his dialogue when taking your side is noble and kind), but this appears to be bugged or dummied out.
The player will receive eggs instead of blood if the player speaks of Gabe as a mere test subject - this will cause Borus to feel guilty and change his ways, upon speaking to him every 24 hours after, he will gain a much "cheerier" personality and will present you with the eggs. Borus will also have different dialogue about the player during the finale. The player will need the animal friend perk to get the to talk negatively of Gabe.