The vast majority of Gelhardt's appearances have come from the substitutes' bench, but the 20-year-old has been impactful whenever he has been introduced.
Gelhardt signed for Leeds in the summer of 2020 for a fee reportedly in the region of £1 million from Wigan Athletic.
Since arriving, the young attacker has scored 18 times for the U23 side as the development squad lifted the Premier League 2 Division 2 title last season.
This year, Gelhardt began the campaign with the U23 squad, but several impressive performances for the juniors rendered him a necessary inclusion in first-team affairs, therefore his exposure at U23 level became increasingly limited.
A first Premier League goal followed, as the Elland Road faithful came to witness the then-teenager's exciting potential.
Here is a round-up of Gelhardt's journey as a Leeds United player so far.
1. First goal
Gelhardt nets his first goal for the U23s in a 2-2 draw with Wolverhampton Wanderers' youngsters at Leeds' Thorp Arch training ground (Photo: Robbie Jay Barratt - AMA/Getty Images)
2. Call-up
Gelhardt is named in a Premier League matchday squad for only the second time as he is pictured at Arsenal's Emirates Stadium in February 2021. He would make the bench eight times before the end of the 2020/21 season.(Photo by Catherine Ivill/Getty Images)
3. Pre-season
Gelhardt finishes his first year as a Leeds United player with 11 goals from 17 matches across all junior competitions. He starts Leeds' first pre-season friendly of the summer away to non-league Guiseley. (Photo by George Wood/Getty Images)
4. Spectacular
The young striker begins the new season in fine form for the U23s, scoring twice in four matches before visiting boyhood club Liverpool. Gelhardt scores two spectacular, long-range strikes in a 4-0 win including an audacious lob from the centre circle. (Photo by Nick Taylor/Liverpool FC/Liverpool FC via Getty Images)
5. Premier League
After making a senior debut for the club away to Fulham in the Carabao Cup and a Premier League debut against Southampton, Gelhardt announces himself to Elland Road with a game-changing substitute appearance versus Wolves in which he earns a last-minute penalty. (Photo by OLI SCARFF/AFP via Getty Images)
6. Part of the furniture
By November 2021, Gelhardt is as much a member of the first-team squad as he is a part of the U23 group. He makes his first Premier League start away to Tottenham Hotspur amid a growing injury crisis at Elland Road. (Photo by Ryan Pierse/Getty Images)