Yesterday I tested the new CuteChess with a gauntlet with 6 opponents 20 games each vs. the gauntlet program and noticed that all 120 games always were tagged with round 1 in the pgn?
It could be tagged either with round 1 - round 120 or introduce a number tag which is widely used.
Then it would be round 1 + number 1-20 and may be round 2 + number 1-20 etc.

Guenther