2013

Gilman made his senior-level debut at the US University Nationals at age 18, where he placed third.^[21]

2017

After his folkstyle career ended, Gilman competed at the US Last Chance World Team Trials Qualifier in May, and placed first to earn a spot at the US World Team Trials.^[22] At the US World Team Trials Challenge Tournament of June, Gilman defeated 2017 NCAA champion Darian Cruz, reigning Pan American champion Tyler Graff, two-time US University national champion Nico Megaludis, and 2015 NCAA champion Nathan Tomasello, to make the best-of-three final.^[23] In the best–of–three, Gilman went on to defeat fellow graduated Hawkeye Tony Ramos twice in a row to become the biggest underdog to make the 2017 US World Team.^[24] Gilman then went on to claim the prestigious Grand Prix of Spain in July.^[25]

At the 2017 World Championships, Gilman opened up with big wins over 2016 European Continental runner–up and two–time Cadet World Champion from Ukraine Andriy Yatsenko and 2017 Asian Continental medalist from Iran Reza Atri, before defeating 2017 Dave Schultz Memorial runner–up Nodirjon Safarov and stunning 2014 Asian Games Gold medalist from North–Korea Jong Hak-jin to astonishingly making the finals of the tournament.^[26] In the finale, Gilman's 15 match win–streak was broken by 2017 Asian Continental champion from Japan Yuki Takahashi, claiming the 2017 World Championship Silver medal.^[27] To cap off the year, Gilman helped Titan Mercury Wrestling Club reach second–place at the Clubs World Championship.^[28]

2018

Gilman started off the year by helping Team USA reach the gold medal at the World Cup, going 2–2.^[29] He then claimed a bronze medal from the Pan American Championships, after falling to 2017 U23 World Champion from Cuba Reineri Andreu in the semifinals and bouncing back in the third–place match.^[30] In June, the defending US World Team Member was able to defeat Junior World Champion Daton Fix twice in a row at Final X Lincoln to make back–to–back teams.^[31] In July, he claimed the prestigious Yasar Dogu International title, defeating Süleyman Atlı in the process.^[32] At the 2018 World Championships, Gilman went on to defeat Italy's Givi Davidovi and Azerbaijan's three–time and reigning European Continental champion Giorgi Edisherashvili, before being defeated by 2018 Asian Continental champion (61kg) from Kazakhstan Nurislam Sanayev and Süleyman Atlı to place fifth.^[33]

2019–2020

Gilman started off the year competing overseas, claiming an Ivan Yarygin Golden Grand Prix bronze medal and placing 15th at the Dan Kolov – Nikola Petrov Memorial.^[34][35] After coming back to the United States, Gilman claimed runner–up honors from the US Open, losing to Daton Fix in the finals but not before beating Nathan Tomasello.^[36][37] In May, he claimed the US World Team Trials Challenge by defeating Darian Cruz twice, becoming the Final X challenger.^[38] At June's Final X, Gilman was defeated by Fix two to one, losing the chance of representing the United States at the World Championships.^[39] Gilman then travelled to Russia to train in Vladikavkaz, and was named the USA Wrestling Athlete of the Week after claiming the Yusup Abdusalamov Memorial.^[40][41] He also competed at the Intercontinental Cup and the Alans International, placing third at twelfth respectively before returning to the United States.^[42][43]

Gilman opened up 2020 with a prestigious Matteo Pellicone Ranking Series title, defeating Daton Fix in the semifinals and 2019 World Championship medalist (61 kg) Joe Colon in the semifinals and finals.^[44] Gilman then continued his streak two months later, and qualified the weight for the United States to compete at the 2020 Summer Olympics after winning the gold medal from the Pan American Olympic Qualification Tournament, notably defeating two–time U23 World Champion from Cuba Reineri Andreu in the semifinals.^[45] Gilman was then scheduled to compete at the 2020 US Olympic Team Trials in April, however, the event was postponed as well as the 2020 Summer Olympics due to the COVID-19 outbreak.^[46] In April 10, Gilman announced his move from his long–time club, the Hawkeye Wrestling Club, to the Nittany Lion Wrestling Club in State College, Pennsylvania.^[47]

After being unable to compete for months due to the pandemic, Gilman competed at his now local NLWC in their first event in September, where he tech'd NCAA champion Darian Cruz.^[48] In their third event, in November, Gilman pinned 2017 Ukrainian International Open runner–up Frank Perrelli, notably calling out Spencer Lee afterwards.^[49] In his last event of the year, Gilman was unable to keep his unbeaten streak and was defeated by 2019 Bill Farrell Memorial champion Seth Gross via criteria in December.^[50]

2021

To open up the year, Gilman competed at the Grand Prix de France Henri Deglane in January, where after downing three–time European Continental champion Giorgi Edisherashvili and 2020 US National champion Vito Arujau in his first two matches, he was controversially defeated by Islam Bazarganov on criteria, but was able to defeat Edisherashvili in the third–place match to claim bronze.^[51] In February, he competed at the fifth NLWC event, and was upset by Zach Sanders, before defeating Sean Russell.^[52] In April 2–3, Gilman, the top–seed, competed at the rescheduled 2020 US Olympic Team Trials in an attempt to represent the United States at the 2020 Summer Olympics.^[53] To make it to the best–of–three, he ran through two–time All–American Zane Richards and World Championship medalist Joe Colon, ending both via technical fall.^[54] Gilman then wrestled Vito Arujau (21–2 since the pandemic, took out Daton Fix in the semifinals), and went on to pin him in the first match and beat him via criteria in the second match. This result qualified Gilman to represent the United States at the 2020 Summer Olympics, and he is expected to do so in August 4–5.^[55][56] He was also expected to compete at the Pan American Continental Championships,^[57] but was forced out due to a foot injury and was replaced by Arujau.^[58]

On August 4, Gilman competed in the first date of the men's freestyle 57 kg of the 2020 Summer Olympics, where he went the distance in a razor-close loss to eventual winner of the Olympic Games and two-time and reigning World Champion Zaur Uguev from the Russian Olympic Committee.^[59] As the Russian kept advancing on the bracket, Gilman was pulled into repechage to compete on August 5, dominating Gulomjon Abdullaev from Uzbekistan and '19 Asian champion Reza Atri from Iran in order to capture the bronze medal for the United States.^[60]

As an Olympic medalist, Gilman earned the right to automatically represent the United States at the 2021 World Championships without having to compete domestically to make the US World Team, and did so from October 3 to 4.^[61] Gilman had a dominant run on the first date, bulldozing through '21 Russian National medalist Abubakar Mutaliev and European Continental medalists Vladimir Egorov and Horst Lehr to make his second World finale.^[62] Different from his 2017 finals, Gilman emerged victorious over '21 Asian Continental finalist Alireza Sarlak on October 4 in order to acclaim the World Championship, becoming the first 57 kilogram American competitor to do so.^[63]

2022

Back from becoming a World Champion, Gilman defeated familiar foe and NCAA champion Darian Cruz eleven points to zero on February 12, at Bout at the Ballpark.^[64] On May 8, he became the Pan American Continental champion, downing Cruz again for the title.^[65] Gilman claimed the spot to represent his country at the 2022 World Championships for the fourth time in his career, taking out Vito Arujau twice in a row at Final X Stillwater.^[66] In July 18, he claimed gold at the Tunis Ranking Series, despite losing to 2021 World medalist Horst Lehr.^[67]

After cruising to the finals with not much trouble, Gilman was downed by Zelimkhan Abakarov on September 17 at the 2022 World Championships, earning a silver medal in his third World finals match.^[68][69]