diff --git a/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.test.ts b/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.test.ts
index 0ca342267..e00b7632a 100644
--- a/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.test.ts
+++ b/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.test.ts
@@ -126,6 +126,7 @@ describe("ConverterAPICGIIDX", () => {
 				},
 				optional: {
 					bp: 8,
+					gauge: 100,
 					gaugeHistory: [
 						22, 22, 22, 22, 22, 22, 23.56, 25.64, 27.72, 30.84, 33.44, 36.04, 37.68,
 						41.32, 43.92, 46.52, 48.08, 49.64, 51.2, 52.24, 54.32, 55.36, 57.44, 60.04,
diff --git a/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.ts b/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.ts
index 80b4d0f9b..cdfb643be 100644
--- a/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.ts
+++ b/typescript/server/src/lib/score-import/import-types/common/api-cg/iidx/converter.ts
@@ -60,6 +60,8 @@ export const ConverterAPICGIIDX: ConverterFunction<CGIIDXScore, CGContext> = asy
 		throw new InternalFailure(`Song-Chart desync with song ID ${chart.song.id} (iidx).`);
 	}
 
+	const gaugeHistory = ConvertGhostGauge(data.ghostGauge);
+
 	const dryScore: DryScore<"iidx-dp" | "iidx-sp"> = {
 		comment: null,
 		game: game,
@@ -75,7 +77,8 @@ export const ConverterAPICGIIDX: ConverterFunction<CGIIDXScore, CGContext> = asy
 			},
 			optional: {
 				bp: data.missCount,
-				gaugeHistory: ConvertGhostGauge(data.ghostGauge),
+				gauge: gaugeHistory ? gaugeHistory[gaugeHistory.length - 1] : undefined,
+				gaugeHistory: gaugeHistory,
 			},
 		},
 		scoreMeta: ConvertOptions(data),