Several of Geisler's accolades includes winning the Best Actor award in the 4th Cinemalaya Independent Film Festival on July 20, 2008 and the 2005 PMPC Best Single Performance of an Actor in Maalaala Mo Kaya ("Would You Remember?").
Geisler was born to Gracia Bayonito of Bicol, Philippines and Donald David Geisler. His older brother is Olympian Donald Geisler.
Geisler entered show business as a child actor in 1994 through the phenomenal variety kiddie/teen gag show, Ang TV. A year later, he became officially a part of ABS-CBN's roster of rising homegrown talents as a member of the elite Star Circle Batch 5. He was considered as one of the network's most promising young stars alongside John Lloyd Cruz and Marc Solis in the teen boy trio "Koolits", where he was once paired up with Kristine Hermosa. Geisler cites veteran Filipino actor Johnny Delgado as a major influence in acting. As a teen, Geisler was paired with several loveteams, most notably with ex-girlfriend Jodi Sta Maria.
Geisler has considered changing network from ABS-CBN to GMA Network after being offered to be a part of SRO Cinemaserye of GMA. Yet, he remained a free lance actor appearing to both networks. Geisler is currently a part of ALV Talent Circuit, Inc.
Geisler's also known to have had past relationships with actresses such as former Tabing Ilog co-star Jodi Sta. Maria, Kristine Hermosa, Matet de Leon, Desiree del Valle, Dionne Monsanto and Cai Cortez (daughter of veteran actor Rez Cortez).
On September 15, 2015, Geisler was involved in a car accident but left unhurt. Geisler's SUV crashed with a 16-wheeler truck in Pasig City before dawn. Geisler was presumably under the influence of alcohol according to early reports. Geisler’s vehicle and the truck were brought to the Pasig City traffic bureau as the investigation continued to determine who was at fault. According to a report from DZMM posted on the ABS-CBN website, the Traffic Division of Pasig City said that Geisler was driving his car after his taping when he got into an accident with the truck. No one was hurt but according to Geisler, his companion during the clash suffered minor injuries.
Geisler's mother died of cancer-related complications on January 22, 2017, aged 60.
Geisler is one of the most controversial young actors in his generation. During the early 2000s, while his performance as an actor was going stellar, his career on the other hand was becoming stiff. He has confessed to being addicted to alcohol after his father's demise and his own break-up with actress Jodi Sta. Maria. Geisler's family house has also been razed by fire twice and he himself has been involved in numerous brawls. One of the said brawls was a bar scuffle, in fact, left him with two visible scars on his left cheek. His own mother eventually signed him up in a detox facility (for 10 days) thus helping him earn the nickname as the "Wild Child" of Pinoy Big Brother: Celebrity Edition 2 and recently tagged as the modern day "Bad Boy" in Philippine showbiz.
Geisler faced a lawsuit against fellow former Pinoy Big Brother housemate Yayo Aguila's daughter Patricia accusing him of an alleged sexual harassment in which Geisler has denied engaging. The case was on-going as Geisler still appeared in his several TV series projects such as Eva Fonda, Tayong Dalawa ("The Two of Us"), The Wedding, among others. Geisler also faced a lawsuit filed by actress Yasmien Kurdi for another alleged sexual harassment case.
Indefinite artist ban
In early 2011, Geisler faced a harassment complaint from actress Cherry Pie Picache who accused him for groping her breast on the set of Noah in which Geisler has denied engaging and claimed it was just an accidental touch. It was reported that Geisler was under the influence of alcohol on that taping day. This was Geisler's fourth acts of lasciviousness/unjust vexation accusation, the other three are with Patricia Martinez, Yasmien Kurdi and Julia Clarete, respectively.
It was later confirmed by Geisler's manager, Arnold Vegafria, that Geisler immediately made a public apology statement in the presence of Picache just right after the incident and voluntarily entered rehabilitation in a 90-day treatment session. The Professional Artist Management, Inc. (PAMI) stated that Geisler will be on an indefinite artist ban which prohibits artists and talents whose managers are PAMI-members from working with Geisler unless he could complete his 90-day treatment session and be fully rehabilitated. Geisler's alcohol rehabilitation started on January 30, 2011 and as per confirmation, had successfully completed.
Return to acting
After finishing rehab, Geisler and Yasmien Kurdi reconciled resulting in Kurdi withdrawing the case filed against him. Geisler played Erning Toothpick (a character originally played by actor Paquito Diaz based on its real life counterpart, Ernesto Reyes) in the 2011 Metro Manila Film Festival entry of Viva Films, Manila Kingpin: The Asiong Salonga Story top-billed by Laguna Governor Jeorge "ER" Ejercito Estregan. He was also part of the fantasy series Dyesebel in 2014 with Anne Curtis, Sam Milby, and Gerald Anderson where he played one of the villains, the devious Kanor de la Paz. Geisler was also part the 2nd Batch of Lucky Stars in Kapamilya Deal or No Deal.
Raymundo dela Rosa
Geisler was temporarily detained for physical assault to his neighbor named Raymundo dela Rosa on November 9, 2012. He was released less than 24 hours after a mutual settlement from both parties as the file was withdrawn by dela Rosa. Geisler claimed that the incident was just for self-defense purposes. It was also later found out that Geisler was intoxicated that time.
Geisler later stated in an interview that he is currently struggling from an extreme bipolar disorder and is recently under a strict medication for the said illness.
In mid 2015, Geisler's video of alleged altercation with a bouncer at a bar in Angeles City went viral in social media. Reports say that Geisler got frustrated and challenged the bouncers to a fist fight after being denied entry at the said bar due to alcohol intoxication.
On May 15, 2016, a video which was originally posted through Facebook by a University of the Philippines filmmaking student Khalil Versoza showing Geisler berating and allegedly hurting a fellow student went viral. According to Verzosa, they hired Geisler for a school project. Furthermore, he stated that Geisler went berserk over the use of an idiot board — a board where dialogue is written for actors to read. In the accompanying caption, Verzosa explained that they were only able to send Geisler the script on the morning of the day of the shoot because, as students, they had to attend to other matters. While Geisler received numerous bashes from netizens, some also questioned the legitimacy of the video as "scripted" and others call it a "social experiment". Geisler issued a statement on the following day saying that the video was "taken out of context" and that whatever the intention of the uploader was, it was "meant to exploit his already damaged reputation". Geisler further said he will consult his lawyers what legal action to take on the video uploader. On May 18, Verzosa said that he and Geisler have talked to each other over the matter. Verzosa revealed that the video they were shooting was focused on Republic Act No. 9262, a law to counter violence against women and children with Geisler's previous court cases involving women as its inspiration. Verzosa added that the reason behind for uploading the video was that as an anti-violence advocate himself, "he initially thought it was his form of justice and awareness raising" and that the "harsh comments and negative reactions" from the netizens towards Geisler are "different" from what he expected. Verzosa and Geisler made amends since and eventually talked over the possibility of shooting an "anti-rape advocacy video" sometime in the future which both are open with. Verzosa took down the video and urged netizens to stop sharing the video. Geisler then posted a message for critics who alleged that he is under the influence of drugs by challenging them to let him take a random drug test as he is willing to take a test any day and that if the result is negative, those critics would have to "pay" him.
On May 25, another video of Geisler went viral through Facebook showing him and independent film actor Kiko Matos on a bar fight in Tomas Morato, Quezon City. According to a witness' testimony about the incident via Facebook, Geisler was "only protective" of the bartender whom Matos was allegedly badmouthing because his company's cocktail drink order was taking time to be served. Geisler was asking the alleged impatient Matos to "lower his voice down" because he's not the only person at the bar. However, Matos was hardened by his comment, telling him to "mind his own business" and lambasted him with foul language. Geisler also responded with reproach, but he also reportedly shoved a stool and flung it on Matos. Additionally, the band performing that night had tried to settle a truce between the two. Geisler appears to have yielded by offering a handshake, but before he could even reach his hand, Matos grabbed him by the arm and punched him several times. Matos later denied that he disrespected the bartender. On a May 29 interview, Matos said that it was Geisler who has started the fight by insisting on jamming with the band which turned out to be a fund-raising concert for a political detainee. He said that Geisler got irked and hurled insults at him and his company just for asking to step down from the stage. Universal Reality Combat Championship, a Philippine-based mixed martial arts company, announced that the two actors will fight in a special exhibition match set on June 25, 2016 at the Valkyrie at The Palace, Taguig to settle the feud between them. The two-round match concluded in a unanimous draw. Post-match, the two actors immediately reconciled over their earlier bouts including the bar scuffle. Geisler commended Matos for their fight despite having had their scores tied admitting he deserved victory. Geisler said of Matos, "I believe we respect each other as actors and as human beings."
In late November 2016, it was reported that Geisler had been involved in an altercation with fellow actor Ping Medina. Medina released a lengthy Facebook post with a photo of himself, sitting on a wheelchair and his middle finger aloft using his broken hand wrapped in bandages as a gesture of contempt against Geisler in the wake of the incident. According to his post, Geisler urinated on him during a shoot of an independent film in Subic. He issued an apology about the incident later on, admitting that he had been drinking and was heavily medicated with anti-depressants while filming. The same day, the film's director, Arlyn Dela Cruz, confirmed on her Facebook account that Geisler's role had been "written out" for the incident; she disclosed that some actors initially advised her not to work with Geisler, due to his "unruly behavior". In December 2016, Dela Cruz also confirmed that she would be replacing Medina with an unnamed actor in hopes that she could bring back the "happy atmosphere" on the set of her film.