BIOGRAPHY
Gabriel Cohuelo grew up in Mexico City, Mexico. Son of an extremely wealthy doctor, at sixteen Gabriel was mostly focused on football and going to university in the States after graduation. During his final exams, however, Gabriel started seizing, as his mind and body moved faster and faster. He was brought home for care and treatment, but no one could understand what was happening. Gabriel was a mutant, one of the first new mutants to manifest on Earth since the Scarlet Witch's spell enacted the Decimation.
Members of the X-Men detected Gabriel on Cerebra and came to offer their services to the Cohuelos. A young girl named Hope Summers was the first new mutant since M-Day and through her all other mutations seemed to flow. By the time Hope arrived, Gabriel had accelerated so much that he was invisible to the naked eye. Once Hope entered the room and got a hold of him, however, Gabriel stabilized. Hope's mutation, her touch, caused Gabriel's mutation to formulate fully, allowing him to exert control over it. Gabriel reappeared with long hair and a full beard, his metabolism seemingly having moved at an incredible rate, aging him physically by more than a year. [Uncanny X-Men (1st series) #527]
Gabriel joined Hope and the X-Men in recruiting the other "Lights," the first new lights appearing on the mutant-detection system Cerebra. After easily recruiting Laurie, Idie and Teon, they faced their first challenge when the fifth light, Kenji, had a violent manifestation. The X-Men attempted to handle the situation themselves, keeping Hope and the Lights out of danger. Hope was not one to sit on the sidelines, though, and she led Gabriel and the others into the mix. Gabriel enjoyed his newfound speed, and also fixated on how attractive Hope was. He found himself wondering if she noticed the couple of times he saved her life during the melee. Eventually, Hope was able to physically reach Kenji, fully activating his powers and restoring his sense of reality at the same time. [Uncanny X-Men (1st series) #528-529, Generation Hope #1-3]
As the Lights journeyed to the X-Men's Utopia island for the first time, they began to mingle with the X-Men and other mutants. Doctor Nemesis embarrassed Gabriel into demonstrating he was actually NOT a speedster, but a relative time manipulator who only appeared to be moving faster when he used his powers. The Lights formed into a clique around Hope, clearly taking direction from her to the exclusion of others like Cyclops or Emma Frost. Still, Scott agreed to make them a Mutant Emergence Rescue team, training to recover newly activated mutants in the field due to their unique connection. And, when they had a quiet moment alone, Hope pulled Gabriel aside and firmly kissed him, saying that, yes, he did get points for saving her life. [Generation Hope #4-5]
The Lights went through several missions, but did not add to their roster. The sixth Light was an unborn child who manifested in the womb and, tragically, the seventh Light was horrified when his mutant powers awakened and took his own life. The sympathetic backlash the team felt at the moment of his death showed just how deeply connected the Lights were to Hope and to each other. Despite this tragedy, Gabriel tried to keep things light for both him and the team. When the group were choosing codenames, he quickly jumped on "Velocidad" (Spanish for speed), despite Laurie complaining he wasn't technically a speedster. [Generation Hope #6-9]
Gabriel and Hope finally went on a date together to see a Captain America biopic. While they were occupied, a faction of the Hellfire Club attacked the Museum of Mutant History. The X-Men on scene were disabled, and Idie was forced to take up arms and kill more than a dozen men with her powers. A second attack came from a suitcase bomb Sentinel descending on Utopia, and Velocidad was injured fighting to defend their island home. In the infirmary afterwards with cute Welsh girl Pixie, Gabriel decided to make a pass at her. Hope caught them making out, ending Gabriel's chances with either girl. Afterwards, Gabriel confessed to Kenji that he wasn't just shallow -- he was living to the fullest whatever time he had left. Velocidad had recognized that aging faster whenever he used his powers was time he wasn't getting back. He was already two years older than he was when he got his powers mere weeks earlier. Even not using his powers at all didn't completely stop the effect. Gabriel understood he was living on borrowed time, and was trying to seize every opportunity when it arose. [Generation Hope #10-12, X-Men: Schism #1-5]
The Lights' team became shorthanded when Idie was sent back to the X-Men's old school in Westchester and out of the field after her incident. Things were awkward for Velocidad when Hope added Pixie to their team for tactical reasons, thanks to her worldwide teleportation powers. Moreover, now that he had given up trying to impress Hope, Gabriel was more vocal in complaining about the consequences of his abilities. He questioned the value of wasting some of his remaining time by using his powers in training sessions, and even wondered whether he should be using them at all. Kenji was also infuriated by Hope's stubbornness and manipulative influence over the Lights. He used his mental abilities to prod Gabriel and Pixie into making out again, distracting them and those loyal to Hope while he provoked those on Utopia with negative feelings towards the "messiah" into attacking her. The team managed to escape Kenji's traps, and he dissolved and seemingly died in the final confrontation. Hope apologized for relying on her "influence" to get her way, and Velocidad and the others willingly chose to remain at her side. [Generation Hope #13-17]
The Mutant Emergence Rescue team remained active for a few weeks after that, although no new mutant manifestations occurred. [Uncanny X-Men (2nd series) #9-10] Hope's destiny finally came to light when the Phoenix Force made its way to Earth. The Avengers started a war with the X-Men over whether Hope should meet the Force or not, throwing Utopia into an uproar. Emma Frost tasked the younger students with watching over Hope, but she beat down Gabriel and the others in order to take off and make her own plans for the Phoenix. [Avengers vs. X-Men #2] Velocidad and the younger X-Men from Utopia were temporarily housed at Avengers Academy in order to keep them out of the fray. They refused to be sidelined, however, and the Lights chose to disregard their captors and searched for some way to help Hope. [Avengers Academy #29-31] 
They found a note Hope left directing them to the alien robot prisoner, Unit. He explained how, a billion years earlier, a similar situation occurred on an alien planet. The Phoenix created a messiah and five acolytes to reignite evolution on that world. Unit's own amoral research and curiosity wanted to observe a situation where the messiah met the Phoenix without her acolytes by her side, and so he manipulated Hope to those ends. Velocidad and the other Lights then had their memories erased by Unit, to protect his experiment. [Uncanny X-Men (2nd series) #13]
Sure enough, Hope and the Phoenix did not bond properly, and the Phoenix Force was split among five X-Men who were present with Hope during the encounter, creating the Phoenix Five. At first, the Phoenix Five seemed poised to introduce heaven on earth, ending wars, bringing rain to deserts, producing mass food crops for humanity. Hope was allowed to just be a normal girl and hang out with Gabriel and her friends rather than face a "glorious destiny." [Avengers vs. X-Men #5-6] Power tends to corrupt, as the saying goes, and the Phoenix Five became increasingly erratic as, one by one, they were defeated in different situations, dividing their power among those who remained. Emma Frost ended up telepathically compelling Velocidad and the mutants of Utopia into submitting to her on their knees. [Avengers vs. X-Men #10]
The X-Men eventually came to recognize the threat and joined forces with the Avengers in opposing the corrupted Phoenix hosts. Velocidad and the students of Utopia were sent to join Idie at the Jean Grey School for Higher Learning. Hope ultimately absorbed the Phoenix Force and triggered the reawakening of the X-gene fully on Earth. With Utopia closed permanently, Gabriel and the Lights made the Jean Grey School their new residence. [Wolverine and the X-Men (1st series) #15]
Velocidad remained a student in good standing at the Jean Grey School for some time. [Wolverine and the X-Men (1st series) #29]
He was recruited by a group of Avengers affiliates during the rise of a group claiming to be Mayan gods. Along with a number of Spanish-speaking heroes such as Silverclaw, Living Lightning and Junta, he traveled to El Salvador to help evacuate civilians and deal with the uprising. [Hulk (2nd series) #55] On another occasion, the extra-dimensional parasite called Mother infiltrated New York, warping perceptions so that adult heroes could not recognize her presence. The Young Avengers called upon Velocidad and other young heroes to hold the line against Mother's invading forces while they battled the entity herself. [Young Avengers (2nd series) #11-13] Overall, though, Gabriel remained in the background at the Jean Grey School among the students, [X-Men (4th series) #16] even as the X-Men eventually relocated the mansion to Central Park as the Xavier Institute for Mutant Education and Outreach. [Iceman (3rd series) #7]
When the Omega-level mutants Legion and X-Man merged into an incredible threat, the reborn Jean Grey sent out a massive call-to-arms that brought nearly every living X-Man together to face them. They lost. The X-Men seemingly died in battle, leaving behind Velocidad and a small number of students and fringe members. Gabriel was traveling with Blindfold and Loa when Loa was killed by Office of National Emergency troops, enforcing a new nationwide crackdown on mutants. They sought refuge among the Morlocks, but Blindfold left Gabriel behind with a cryptic warning that he would be caught soon. Velocidad was forced to use his powers repeatedly in order to avoid threats and patrols, and his physical age accelerated dramatically as a result. He ran into Wolverine in the Tunnels when Logan was looking for Blindfold. [Uncanny X-Men (5th series) #11]
Ruth's warning soon came true when the Morlock Tunnels were assaulted by O*N*E, and Velocidad was taken captive. 
General Callahan was growing techno-organic Sentinels by using Technarch viral seeds from Warlock as a template. Gabriel was tortured for weeks of real time, significantly longer for him, as Callahan used Gabe to accelerate his timetable. Velocidad was forced into a symbiotic bond with Warlock and then shifted into a faster rate of time, allowing O*N*E to grow new techno-organics to fruition much faster than with other hosts. He was barely alive when Wolverine was brought in by the O*N*E and broke free. Logan discovered Gabriel in one of the labs, barely clinging to life and now decades older than his natural years. At Velocidad's request, Logan put him out of his misery, one of but many casualties of the O*N*E's horrendous activities. [Uncanny X-Men (5th series) #21]