In 2013, Van der Walt was selected to represent the at the Under-18 Craven Week competition held in Polokwane; he also scored a try for the Golden Lions in their match against SWD. He was also selected to represent the s in the Under-19 Provincial Championship just a month later. He made seven appearances in the competition – all of those as a replacement – as the Golden Lions finished second on the log and reached the final of the competition, where they lost to the s. He again appeared for their Under-19s in the 2014 Under-19 Provincial Championship, having firmly established himself as their first-choice inside centre, starting all twelve of their matches in that position. He scored tries in their matches against the s and the s, but could not help the team qualify for the semi-finals as they ended the season in fifth position. He made his first class debut during Round Two of the 2015 Vodacom Cup competition, coming on as a replacement in the second half of their 31–21 victory over in Polokwane. His next appearance saw him elevated to the starting line-up in their final match in the competition, a 36–20 victory over the as the Golden Lions completed the regular season with sevens wins in seven matches. He also appeared off the bench in their semi-final match against the, but it ended in disappointment as the team from Nelspruit ran out 43–20 winners. He made eleven starts for the s in the 2015 Under-21 Provincial Championship Group A, scoring tries in five of those matches to help them finish fourth on the log. He was included in the ' Currie Cup starting line-up for the final match of the 2015 Currie Cup Premier Division regular season. He helped them to a 29–19 victory over to finish the regular season unbeaten, winning all ten matches.
Personal life
He is the younger brother of fly-halfJaco van der Walt. Both brothers came through the ranks at the and they played together on occasion; on 8 May 2015, both were selected in the starting line-up for the Golden Lions' match against the in Welkom, while they also played next to each other in the final match of the 2015 Currie CupPremier Division regular season, in a match that saw Gerdus make his debut in the competition.
