Euromillions Lottery Ticket

With four other couples, we agreed an informal syndicate where we each take it in turns to enter 4 rows on Euromillions. Lately I have seen suggestions that a win with the winner sharing the winnings with the four other couples may attract a gift tax of 60%. I have seen the possibility of a syndicate for the French national lottery at the point of sale (entering how many others will share and the same number of tickets being issued but is there way for the Euromillions lottery. If not is there any way of notifying that the entry is a syndicate to avoid such a high tax liability for those who have not purchased the winning ticket. Obviously we are not bothered amout small(ish) wins but should we win a substantial sum…

Interesting point, and honestly have no idea, other than that the tax office always likes to have its pound of flesh…