GameDB: Add missing GT fixes

bin/resources/GameIndex.yaml

@@ -868,6 +868,11 @@ PCPX-96622:
 PCPX-96624:
   name: "Gran Turismo Concept - 2001 Tokyo"
   region: "NTSC-J"
+  gsHWFixes:
+    recommendedBlendingLevel: 3 # Improves banding in car showcase as well as car brightness and sheen.
+    mipmap: 2 # Mipmap + trilinear, improves ground textures to match sw renderer.
+    trilinearFiltering: 1
+    getSkipCount: "GSC_PolyphonyDigitalGames" # Fixes post processing.
 PCPX-96625:
   name: "プレプレ2 VOLUME.4"
   name-sort: "ぷれぷれ2 VOLUME.4"
@@ -8076,6 +8081,11 @@ SCPS-15010:
   name-en: "Gran Turismo - Concept 2001 Tokyo"
   region: "NTSC-J"
   compat: 5
+  gsHWFixes:
+    recommendedBlendingLevel: 3 # Improves banding in car showcase as well as car brightness and sheen.
+    mipmap: 2 # Mipmap + trilinear, improves ground textures to match sw renderer.
+    trilinearFiltering: 1
+    getSkipCount: "GSC_PolyphonyDigitalGames" # Fixes post processing.
 SCPS-15011:
   name: EXTERMINATION
   name-sort: EXTERMINATION
@@ -9241,6 +9251,11 @@ SCPS-19208:
   name-sort: ぐらんつーりすも Concept2001 TOKYO PlayStation 2 the Best
   name-en: "Gran Turismo - Concept 2001 Tokyo [PlayStation 2 the Best]"
   region: "NTSC-J"
+  gsHWFixes:
+    recommendedBlendingLevel: 3 # Improves banding in car showcase as well as car brightness and sheen.
+    mipmap: 2 # Mipmap + trilinear, improves ground textures to match sw renderer.
+    trilinearFiltering: 1
+    getSkipCount: "GSC_PolyphonyDigitalGames" # Fixes post processing.
 SCPS-19209:
   name: ぼくのなつやすみ2 海の冒険篇 PlayStation 2 the Best
   name-sort: ぼくのなつやすみ2 うみのぼうけんへん PlayStation 2 the Best
@@ -9786,6 +9801,11 @@ SCPS-55004:
 SCPS-55005:
   name: "Gran Turismo - Concept 2001 Tokyo"
   region: "NTSC-J"
+  gsHWFixes:
+    recommendedBlendingLevel: 3 # Improves banding in car showcase as well as car brightness and sheen.
+    mipmap: 2 # Mipmap + trilinear, improves ground textures to match sw renderer.
+    trilinearFiltering: 1
+    getSkipCount: "GSC_PolyphonyDigitalGames" # Fixes post processing.
 SCPS-55006:
   name: "Wild ARMs - Advanced 3rd"
   region: "NTSC-J"