diff --git a/headless-services/concourse-language-server/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java b/headless-services/concourse-language-server/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
index 26f25724b..d0a744a02 100644
--- a/headless-services/concourse-language-server/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
+++ b/headless-services/concourse-language-server/src/main/java/org/springframework/ide/vscode/concourse/PipelineYmlSchema.java
@@ -605,8 +605,13 @@ public class PipelineYmlSchema implements YamlSchema {
 			AbstractType swift_source = f.ybean("SwiftSemverSource");
 			addProp(swift_source, "openstack", t_any).isPrimary(true);
 
+			AbstractType gcs_source = f.ybean("GcsSemverSource");
+			addProp(gcs_source, "bucket", t_ne_string).isRequired(true);
+			addProp(gcs_source, "key", t_ne_string).isRequired(true);
+			addProp(gcs_source, "json_key", t_ne_string).isRequired(true);
+
 			AbstractType[] driverSpecificSources = {
-					git_source, s3_source, swift_source
+					git_source, s3_source, swift_source, gcs_source
 			};
 
 			AbstractType source = f.contextAware("SemverSource", (dc) -> {
@@ -617,12 +622,14 @@ public class PipelineYmlSchema implements YamlSchema {
 					return s3_source;
 				case "swift":
 					return swift_source;
+				case "gcs":
+					return gcs_source;
 				default:
 					return null;
 				}
 			}).treatAsBean();
 			addProp(source, "initial_version", t_semver);
-			addProp(source, "driver", f.yenum("SemverDriver", "git", "s3", "swift")).isPrimary(true, false);
+			addProp(source, "driver", f.yenum("SemverDriver", "git", "s3", "swift", "gcs")).isPrimary(true, false);
 			for (AbstractType s : driverSpecificSources) {
 				for (YTypedProperty p : source.getProperties()) {
 					s.addProperty(p);
diff --git a/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/bucket.md b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/bucket.md
new file mode 100644
index 000000000..5446e6654
--- /dev/null
+++ b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/bucket.md
@@ -0,0 +1 @@
+*Required*. The name of the bucket.
\ No newline at end of file
diff --git a/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/json_key.md b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/json_key.md
new file mode 100644
index 000000000..4422168de
--- /dev/null
+++ b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/json_key.md
@@ -0,0 +1,10 @@
+*Required*. The contents of your GCP Account JSON Key. Example:
+
+	json_key: |
+	  {
+	    "private_key_id": "...",
+	    "private_key": "...",
+	    "client_email": "...",
+	    "client_id": "...",
+	    "type": "service_account"
+	  }
\ No newline at end of file
diff --git a/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/key.md b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/key.md
new file mode 100644
index 000000000..79a3c41b0
--- /dev/null
+++ b/headless-services/concourse-language-server/src/main/resources/desc/GcsSemverSource/key.md
@@ -0,0 +1 @@
+*Required*. The key to use for the object in the bucket tracking the version.
\ No newline at end of file
diff --git a/headless-services/concourse-language-server/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java b/headless-services/concourse-language-server/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
index ac498cb04..4f3f35304 100644
--- a/headless-services/concourse-language-server/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
+++ b/headless-services/concourse-language-server/src/test/java/org/springframework/ide/vscode/concourse/ConcourseEditorTest.java
@@ -2143,6 +2143,20 @@ public class ConcourseEditorTest {
 				"version|Unused",
 				"source|'openstack' is required"
 		);
+
+		//required props for gcs driver
+		editor = harness.newEditor(
+				"resources:\n" +
+				"- name: version\n" +
+				"  type: semver\n" +
+				"  check_every: 1h  \n" +
+				"  source:\n" +
+				"    driver: gcs"
+		);
+		editor.assertProblems(
+				"version|Unused",
+				"source|Properties [bucket, json_key, key] are required"
+		);
 	}
 
 	@Test public void semverResourceSourceBadDriver() throws Exception {
@@ -2159,6 +2173,53 @@ public class ConcourseEditorTest {
 		);
 	}
 
+	@Test public void semverGcsResourceSourceContentAssist() throws Exception {
+		assertContextualCompletions(PLAIN_COMPLETION,
+				"resources:\n" +
+				"- name: version\n" +
+				"  type: semver\n" +
+				"  source:\n" +
+				"    driver: gcs\n" +
+				"    <*>"
+				, // ===========
+				"<*>"
+				, // ==>
+				    "bucket: $1\n" +
+				"    key: $2\n" +
+				"    json_key: $3<*>"
+				, // --
+				"bucket: <*>",
+				"json_key: <*>",
+				"key: <*>"
+		);
+	}
+
+	@Test public void semverGcsResourceReconcileAndHover() throws Exception {
+		Editor editor;
+
+		// required props for git driver
+		editor = harness.newEditor(
+				"resources:\n" +
+				"- name: version\n" +
+				"  type: semver\n" +
+				"  source:\n" +
+				"    driver: gcs\n" +
+				"    bucket: some-bucket\n" +
+				"    key: some-key\n" +
+				"    json_key: some-json-key-string\n" +
+				"    bogus: bad"
+		);
+		editor.assertProblems(
+				"version|Unused",
+				"bogus|Unknown property"
+		);
+
+		editor.assertHoverContains("driver", "The driver to use");
+		editor.assertHoverContains("bucket", "The name of the bucket");
+		editor.assertHoverContains("key", "key to use for the object in the bucket tracking the version");
+		editor.assertHoverContains("json_key", "contents of your GCP Account JSON Key");
+	}
+
 	@Test public void semverGitResourceSourceContentAssist() throws Exception {
 		assertContextualCompletions(PLAIN_COMPLETION,
 				"resources:\n" +