Gran Turismo 7 will be releasing on the PS5 and PS4 on 4th March 2022, but those who have pre-ordered the digital version will be able to preload the game ahead of release. According to @PlayStationSize, the game will be just shy of 90 GB on the PS5, not including any day-one patches or updates.
The game will be available to pre-load from 25th February 2022 – a week before the official launch. However, you won’t be able to play the game until 00:00 on 4th March 2022, when the game officially launches.
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The game size on PlayStation Direct is listed as 110 GB minimum, so be sure you have enough space to download and install the game ahead of release.