gms_highscore_find_pos

//Show 'Size43's' score
var pos, size43_score;
pos = gms_highscore_find_pos(1, "Size43")
if(pos == -1)
{
    show_message("Size43 was not found")
}else{
    size43_score = gms_highscore_score(1, pos);
    show_message("Size43:  "+string(size43_score))
}