GT6 could morph into GT7 on PS4
Sony reveals details of new Gran Turismo Sport link up with FIA
Rumour: Decision to Bring Gran Turismo 7 to PS4 Made 'Fairly Recently
GT6 Update 1.12 Released: Includes New Track, New Online Features, New Cars – GTPlanet
Review - Gran Turismo 7 - WayTooManyGames
Better sound, better graphics, better physics—the Gran Turismo 7 review
Gran Turismo Sport vs GT6 vs GT4 Show Impressive Visual Differences
Gran Turismo 7 Review
Kazunori Yamauchi: “Major Updates” Coming for GT6 – GTPlanet
Gran Turismo 6 producer talks physics engines, smartphone linkups, and the presumed GT7 - Polygon
Why Gran Turismo 7's Latest Update Has Outraged Fans – GTPlanet
Performance Points, Gran Turismo Wiki
Gran Turismo 7 – PS5 vs. PS4 performance comparison, and what about the ray tracing?