All you need to do to receive the gifts is log into
Gran Turismo 7 and visit the World Map at any time during the two qualifying periods. You’ll receive one per day you log in, up to a maximum of five in each ten-day period.
...
Your first reward will be available at 0000 UTC on Friday December 15, with the “Holiday Season Login” campaign running from then until 2359 UTC on Monday December 25. The “New Years Login” campaign follows, from 0000 UTC on Tuesday December 26 until 2359 UTC on Sunday January 7 2024.
Additionally, all players will receive a special Six-Star Roulette ticket for Cars during the post-Christmas period to mark the impending
shutdown of Gran Turismo Sport.