diff --git a/cachi2/core/package_managers/bundler/parser.py b/cachi2/core/package_managers/bundler/parser.py
index fcea98b35..500e7e6f7 100644
--- a/cachi2/core/package_managers/bundler/parser.py
+++ b/cachi2/core/package_managers/bundler/parser.py
@@ -90,6 +90,13 @@ class GemPlatformSpecificDependency(GemDependency):
 
     platform: str
 
+    @property
+    def purl(self) -> str:
+        """Get PURL for this dependency."""
+        qualifiers = {"platform": self.platform}
+        purl = PackageURL(type="gem", name=self.name, version=self.version, qualifiers=qualifiers)
+        return purl.to_string()
+
     @property
     def remote_location(self) -> str:
         """Return remote location to download this gem from."""
diff --git a/tests/integration/test_data/bundler_everything_present/bom.json b/tests/integration/test_data/bundler_everything_present/bom.json
index b89452a34..d15652fa9 100644
--- a/tests/integration/test_data/bundler_everything_present/bom.json
+++ b/tests/integration/test_data/bundler_everything_present/bom.json
@@ -397,7 +397,87 @@
           "value": "cachi2"
         }
       ],
-      "purl": "pkg:gem/nokogiri@1.16.7",
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=aarch64-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=arm-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=arm64-darwin",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86_64-darwin",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86_64-linux",
       "type": "library",
       "version": "1.16.7"
     },
diff --git a/tests/integration/test_data/bundler_everything_present_except_gemspec/bom.json b/tests/integration/test_data/bundler_everything_present_except_gemspec/bom.json
index 84d2dd914..a22209305 100644
--- a/tests/integration/test_data/bundler_everything_present_except_gemspec/bom.json
+++ b/tests/integration/test_data/bundler_everything_present_except_gemspec/bom.json
@@ -408,7 +408,87 @@
           "value": "cachi2"
         }
       ],
-      "purl": "pkg:gem/nokogiri@1.16.7",
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=aarch64-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=arm-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=arm64-darwin",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86-linux",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86_64-darwin",
+      "type": "library",
+      "version": "1.16.7"
+    },
+    {
+      "name": "nokogiri",
+      "properties": [
+        {
+          "name": "cachi2:bundler:package:binary",
+          "value": "true"
+        },
+        {
+          "name": "cachi2:found_by",
+          "value": "cachi2"
+        }
+      ],
+      "purl": "pkg:gem/nokogiri@1.16.7?platform=x86_64-linux",
       "type": "library",
       "version": "1.16.7"
     },
diff --git a/tests/unit/package_managers/bundler/test_parser.py b/tests/unit/package_managers/bundler/test_parser.py
index ae3e63dde..ee6a36142 100644
--- a/tests/unit/package_managers/bundler/test_parser.py
+++ b/tests/unit/package_managers/bundler/test_parser.py
@@ -318,6 +318,15 @@ def test_purls(rooted_tmp_path_repo: RootedPath) -> None:
             ),
             "pkg:gem/my-gem-dep@0.1.0",
         ),
+        (
+            GemPlatformSpecificDependency(
+                name="my-platform-gem-dep",
+                version="0.1.0",
+                source="https://rubygems.org",
+                platform="x86_64_linux",
+            ),
+            "pkg:gem/my-platform-gem-dep@0.1.0?platform=x86_64_linux",
+        ),
         (
             GitDependency(
                 name="my-git-dep",