0001703644 2026-10-05 2026-10-05 0001703644 us-gaap:CommonStockMember 2026-10-05 2026-10-05 0001703644 gpmt:SeriesA700percentageFixedtoFloatingRateCumulativeRedeemablePreferredStockparvaluedollar001pershareMember 2026-10-05 2026-10-05 false --12-31 0001703644 8-K 2026-10-05 Granite Point Mortgage Trust Inc. MD 001-38124 61-1843143 1114 Avenue of the Americas Suite 3020 New York NY 10036 212 364-5500 false false false false Common Stock, par value $0.01 per share GPMT NYSE 7.00% Series A Fixed-to-Floating Rate Cumulative Redeemable Preferred Stock, par value $0.01 per share GPMTPrA NYSE false