Gelant came to the attention of provincial selectors as early as primary school level, when he was selected to represent SWD at the Under-13 Craven Week tournament in 2008.

Even though he was in the Under-17 age group, he represented SWD at the 2012 Under-18 Craven Week competition and his performances there also ensured he was selected in the 2012 South African Schools team.

[9] He played off the bench for their final pool match, a 21–8 victory over Samoa as South Africa finished top of the group to set up a rematch with New Zealand in the semi-finals.

Gelant started the semi-final and helped South Africa secure their fourth consecutive victory over New Zealand at this level, winning 32–25.

In March 2015, Gelant was named in an extended South Africa Under-20 training group as part of their preparation for the 2015 World Rugby Under 20 Championship.