diff --git a/lib/public/AppFramework/ORM/Repository.php b/lib/public/AppFramework/ORM/Repository.php
index 00ca1989c90ae..7f3e26748b5c7 100644
--- a/lib/public/AppFramework/ORM/Repository.php
+++ b/lib/public/AppFramework/ORM/Repository.php
@@ -98,7 +98,7 @@ private function hydrateRow(string $entityClass, mixed $row): object {
 				ColumnType::Bigint, ColumnType::Smallint, ColumnType::Integer => (int)$value,
 				ColumnType::Float => (float)$value,
 				ColumnType::Boolean => (bool)$value,
-				ColumnType::Binary, ColumnType::Decimal, ColumnType::Text, ColumnType::String => (string)$value,
+				ColumnType::Binary, ColumnType::Decimal, ColumnType::Guid, ColumnType::Text, ColumnType::String => (string)$value,
 				ColumnType::Time, ColumnType::Date, ColumnType::Datetime, ColumnType::DatetimeTz => $value instanceof \DateTime
 					? $value
 					: new \DateTime((string)$value),
diff --git a/lib/public/DB/Schema/ColumnType.php b/lib/public/DB/Schema/ColumnType.php
index 2a2cd1d633816..496157de59137 100644
--- a/lib/public/DB/Schema/ColumnType.php
+++ b/lib/public/DB/Schema/ColumnType.php
@@ -164,6 +164,15 @@ enum ColumnType: string {
 	 */
 	case Json = 'json';
 
+	/**
+	 * If you want to store a GUID, you should consider using this type, as some database vendors have a native data type for this kind of data which offers the most efficient way to store it.
+	 * For vendors that do not support this type natively, this type is mapped to the string type internally.
+	 * Values retrieved from the database are always converted to PHP's string type or null if no data is present.
+	 *
+	 * @since 35.0.0
+	 */
+	case Guid = 'guid';
+
 	/**
 	 * @since 35.0.0
 	 */
diff --git a/lib/public/DB/Types.php b/lib/public/DB/Types.php
index ad5525c3346f6..ac2ddf651884d 100644
--- a/lib/public/DB/Types.php
+++ b/lib/public/DB/Types.php
@@ -178,4 +178,13 @@ final class Types {
 	 *                    It is recommended to use a simple STRING field and handle JSON within PHP
 	 */
 	public const JSON = 'json';
+
+	/**
+	 * If you want to store a GUID, you should consider using this type, as some database vendors have a native data type for this kind of data which offers the most efficient way to store it.
+	 * For vendors that do not support this type natively, this type is mapped to the string type internally.
+	 * Values retrieved from the database are always converted to PHP's string type or null if no data is present.
+	 *
+	 * @since 35.0.0
+	 */
+	public const GUID = 'guid';
 }