diff --git a/flashchips.c b/flashchips.c
index 547e288..a7c3c67 100644
--- a/flashchips.c
+++ b/flashchips.c
@@ -8265,6 +8265,177 @@
 
 	{
 		.vendor		= "GigaDevice",
+		.name		= "GD25B512ME/GD25R512ME",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD25B512ME,
+		.total_size	= 65536,
+		.page_size	= 256,
+		/* Supports QPI_38, but with non-volatile DC bits
+		   (which probably also affect QIO (0xeb) in SPI mode). */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR2 | FEATURE_OTP |
+				  FEATURE_4BA | FEATURE_FAST_READ_QPI4B | FEATURE_FAST_READ_QOUT,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 16384} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 16384} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 2048} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 2048} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 1024} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 1024} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {65536 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {65536 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		/* Has WPS bit in unsupported register. */
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
+		.name		= "GD55B01GE",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD55B01GE,
+		.total_size	= 128 * 1024,
+		.page_size	= 256,
+		/* Supports QPI_38, but with non-volatile DC bits
+		   (which probably also affect QIO (0xeb) in SPI mode). */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR2 | FEATURE_OTP |
+				  FEATURE_4BA | FEATURE_FAST_READ_QPI4B | FEATURE_FAST_READ_QOUT,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 32768} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 4096} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 2048} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {128 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		/* Has WPS bit in unsupported register. */
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
+		.name		= "GD55B02GE",
+		.bustype	= BUS_SPI,
+		.manufacture_id	= GIGADEVICE_ID,
+		.model_id	= GIGADEVICE_GD55B02GE,
+		.total_size	= 256 * 1024,
+		.page_size	= 256,
+		/* Supports QPI_38, but with non-volatile DC bits
+		   (which probably also affect QIO (0xeb) in SPI mode). */
+		.feature_bits	= FEATURE_WRSR_EITHER | FEATURE_WRSR2 | FEATURE_OTP |
+				  FEATURE_4BA | FEATURE_FAST_READ_QPI4B | FEATURE_FAST_READ_QOUT,
+		.tested		= TEST_UNTESTED,
+		.probe		= probe_spi_rdid,
+		.probe_timing	= TIMING_ZERO,
+		.block_erasers	=
+		{
+			{
+				.eraseblocks = { {4 * 1024, 65536} },
+				.block_erase = spi_block_erase_21,
+			}, {
+				.eraseblocks = { {4 * 1024, 65536} },
+				.block_erase = spi_block_erase_20,
+			}, {
+				.eraseblocks = { {32 * 1024, 8192} },
+				.block_erase = spi_block_erase_5c,
+			}, {
+				.eraseblocks = { {32 * 1024, 8192} },
+				.block_erase = spi_block_erase_52,
+			}, {
+				.eraseblocks = { {64 * 1024, 4096} },
+				.block_erase = spi_block_erase_dc,
+			}, {
+				.eraseblocks = { {64 * 1024, 4096} },
+				.block_erase = spi_block_erase_d8,
+			}, {
+				.eraseblocks = { {256 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_60,
+			}, {
+				.eraseblocks = { {256 * 1024 * 1024, 1} },
+				.block_erase = spi_block_erase_c7,
+			}
+		},
+		/* Has WPS bit in unsupported register. */
+		.printlock	= spi_prettyprint_status_register_bp4_srwd,
+		.unlock		= spi_disable_blockprotect_bp4_srwd,
+		.write		= spi_chip_write_256,
+		.read		= spi_chip_read,
+		.voltage	= {2700, 3600},
+		.wp_write_cfg	= spi_wp_write_cfg,
+		.wp_read_cfg	= spi_wp_read_cfg,
+		.wp_get_ranges	= spi_wp_get_available_ranges,
+		.decode_range	= decode_range_spi25,
+		.prepare_access	= spi_prepare_io,
+		.finish_access	= spi_finish_io,
+	},
+
+	{
+		.vendor		= "GigaDevice",
 		.name		= "GD25T80",
 		.bustype	= BUS_SPI,
 		.manufacture_id	= GIGADEVICE_ID,
diff --git a/include/flashchips.h b/include/flashchips.h
index 607ff1f..301f579 100644
--- a/include/flashchips.h
+++ b/include/flashchips.h
@@ -405,6 +405,9 @@
 #define GIGADEVICE_GD25VQ41B	0x4213  /* Same as GD25VQ40C, can be distinguished by SFDP */
 #define GIGADEVICE_GD25VQ80C	0x4214
 #define GIGADEVICE_GD25VQ16C	0x4215
+#define GIGADEVICE_GD25B512ME	0x471a	/* Same as GD25R512ME */
+#define GIGADEVICE_GD55B01GE	0x471b
+#define GIGADEVICE_GD55B02GE	0x471c
 #define GIGADEVICE_GD25LQ40	0x6013
 #define GIGADEVICE_GD25LQ80	0x6014
 #define GIGADEVICE_GD25LQ16	0x6015