diff --git a/backend/.env.dist b/backend/.env.dist
index 580f7ad2b..0164abff0 100644
--- a/backend/.env.dist
+++ b/backend/.env.dist
@@ -65,5 +65,7 @@ WEBHOOK_ELOPAGE_SECRET=secret
 FEDERATION_VALIDATE_COMMUNITY_TIMER=60000
 
 # GMS
+# GMS_ACTIVE=true
+# Coordinates of Illuminz test instance
 GMS_HOST=54.176.169.179
 GMS_PORT=3071
diff --git a/backend/.env.template b/backend/.env.template
index 05cec536e..290d180b3 100644
--- a/backend/.env.template
+++ b/backend/.env.template
@@ -63,5 +63,6 @@ WEBHOOK_ELOPAGE_SECRET=$WEBHOOK_ELOPAGE_SECRET
 FEDERATION_VALIDATE_COMMUNITY_TIMER=$FEDERATION_VALIDATE_COMMUNITY_TIMER
 
 # GMS
+GMS_ACTIVE=$GMS_ACTIVE
 GMS_HOST=$GMS_HOST
 GMS_PORT=$GMS_PORT
diff --git a/backend/src/apis/gms/GmsClient.ts b/backend/src/apis/gms/GmsClient.ts
index 6f92f3ee3..e4bdd4371 100644
--- a/backend/src/apis/gms/GmsClient.ts
+++ b/backend/src/apis/gms/GmsClient.ts
@@ -8,11 +8,11 @@ import { CONFIG } from '@/config'
 import { LogError } from '@/server/LogError'
 import { backendLogger as logger } from '@/server/logger'
 
-import { GmsCommunity } from './model/GmsCommunity'
 import { GmsUser } from './model/GmsUser'
 
+/*
 export async function communityList(): Promise<GmsCommunity[] | string | undefined> {
-  const baseUrl = 'http://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
+  const baseUrl = 'https://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
   const service = 'community/list?page=1&perPage=20'
   const config = {
     headers: {
@@ -32,10 +32,10 @@ export async function communityList(): Promise<GmsCommunity[] | string | undefin
     }
     logger.debug('responseData:', result.data.responseData.data)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-call
-    const gmsCom = JSON.parse(result.data.responseData.data)
-    logger.debug('gmsCom:', gmsCom)
+    // const gmsCom = JSON.parse(result.data.responseData.data)
+    // logger.debug('gmsCom:', gmsCom)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-    return gmsCom
+    return result.data.responseData.data
   } catch (error: any) {
     logger.error('Error in Get community/list:', error)
     const errMsg: string = error.message
@@ -44,7 +44,7 @@ export async function communityList(): Promise<GmsCommunity[] | string | undefin
 }
 
 export async function userList(): Promise<GmsUser[] | string | undefined> {
-  const baseUrl = 'http://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
+  const baseUrl = 'https://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
   const service = 'community-user/list?page=1&perPage=20'
   const config = {
     headers: {
@@ -68,10 +68,10 @@ export async function userList(): Promise<GmsUser[] | string | undefined> {
     }
     logger.debug('responseData:', result.data.responseData.data)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-call
-    const gmsUser = JSON.parse(result.data.responseData.data)
-    logger.debug('gmsUser:', gmsUser)
+    // const gmsUser = JSON.parse(result.data.responseData.data)
+    // logger.debug('gmsUser:', gmsUser)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-    return gmsUser
+    return result.data.responseData.data
   } catch (error: any) {
     logger.error('Error in Get community-user/list:', error)
     const errMsg: string = error.message
@@ -80,7 +80,7 @@ export async function userList(): Promise<GmsUser[] | string | undefined> {
 }
 
 export async function userByUuid(uuid: string): Promise<GmsUser[] | string | undefined> {
-  const baseUrl = 'http://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
+  const baseUrl = 'https://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
   const service = 'community-user/list?page=1&perPage=20'
   const config = {
     headers: {
@@ -104,19 +104,20 @@ export async function userByUuid(uuid: string): Promise<GmsUser[] | string | und
     }
     logger.debug('responseData:', result.data.responseData.data)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-call
-    const gmsUser = JSON.parse(result.data.responseData.data)
-    logger.debug('gmsUser:', gmsUser)
+    // const gmsUser = JSON.parse(result.data.responseData.data)
+    // logger.debug('gmsUser:', gmsUser)
     // eslint-disable-next-line @typescript-eslint/no-unsafe-return
-    return gmsUser
+    return result.data.responseData.data
   } catch (error: any) {
     logger.error('Error in Get community-user/list:', error)
     const errMsg: string = error.message
     return errMsg
   }
 }
+*/
 
 export async function createGmsUser(apiKey: string, user: GmsUser): Promise<boolean> {
-  const baseUrl = 'http://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
+  const baseUrl = 'https://'.concat(CONFIG.GMS_HOST).concat(':').concat(CONFIG.GMS_PORT).concat('/')
   const service = 'community-user'
   const config = {
     headers: {
@@ -125,7 +126,6 @@ export async function createGmsUser(apiKey: string, user: GmsUser): Promise<bool
       timezone: 'UTC',
       connection: 'keep-alive',
       authorization: apiKey,
-      // 'eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkYXRhIjoiVTJGc2RHVmtYMThuNzllbGJscThDbmxxZ0I2SGxicTZuajlpM2lmV3BTc3pHZFRtOFVTQjJZNWY2bG56elhuSUF0SEwvYVBWdE1uMjA3bnNtWDQ0M21xWVFyd0xJMklHNGtpRkZ3U2FKbVJwRk9VZXNDMXIyRGlta3VLMklwN1lYRTU0c2MzVmlScmMzaHE3djlFNkRabk4xeVMrU1QwRWVZRFI5c09pTDJCdmg4a05DNUc5NTdoZUJzeWlRbXcrNFFmMXFuUk5SNXpWdXhtZEE2WUUrT3hlcS85Y0d6NURyTmhoaHM3MTJZTFcvTmprZGNwdU55dUgxeWxhNEhJZyIsImlhdCI6MTcwMDUxMDg4OX0.WhtNGZc9A_hUfh8CcPjr44kWQWMkKJ7hlYXELOd3yy4',
     },
   }
   try {
diff --git a/backend/src/apis/gms/model/GmsEnums.ts b/backend/src/apis/gms/model/GmsEnums.ts
index 00662c47c..708df85cf 100644
--- a/backend/src/apis/gms/model/GmsEnums.ts
+++ b/backend/src/apis/gms/model/GmsEnums.ts
@@ -35,3 +35,15 @@ registerEnumType(GmsPublishPostType, {
   name: 'GmsPublishPostType', // this one is mandatory
   description: 'Type of name publishing', // this one is optional
 })
+
+export enum GmsLocationType {
+  GMS_LOCATION_TYPE_EXACT = 0,
+  GMS_LOCATION_TYPE_APPROXIMATE = 1,
+  GMS_LOCATION_TYPE_RANDOM = 2,
+}
+
+registerEnumType(GmsLocationType, {
+  name: 'GmsLocationType', // this one is mandatory
+  description: 'Type of location treatment in GMS', // this one is optional
+})
+
diff --git a/backend/src/apis/gms/model/GmsUser.ts b/backend/src/apis/gms/model/GmsUser.ts
index 537cb40c2..0c0202b0f 100644
--- a/backend/src/apis/gms/model/GmsUser.ts
+++ b/backend/src/apis/gms/model/GmsUser.ts
@@ -1,6 +1,11 @@
 import { User as dbUser } from '@entity/User'
 
-import { GmsPublishNameType, GmsPublishPhoneType, GmsPublishPostType } from './GmsEnums'
+import {
+  GmsLocationType,
+  GmsPublishNameType,
+  GmsPublishPhoneType,
+  GmsPublishPostType,
+} from './GmsEnums'
 
 export class GmsUser {
   constructor(user: dbUser) {
@@ -12,11 +17,11 @@ export class GmsUser {
     this.firstName = this.getGmsFirstName(user)
     this.lastName = this.getGmsLastName(user)
     this.alias = user.alias ? user.alias : undefined
-    this.address = this.getGmsAddress(user) ?? 'Deutschland'
-    this.zipCode = this.getGmsZipCode(user)
-    this.city = this.getGmsCity(user)
-    this.country = this.getGmsCountry(user)
-    this.type = 2
+    this.address = this.getGmsAddress(user)
+    // this.zipCode = this.getGmsZipCode(user)
+    // this.city = this.getGmsCity(user)
+    // this.country = this.getGmsCountry(user)
+    this.type = GmsLocationType.GMS_LOCATION_TYPE_RANDOM
     this.location = null
   }
 
@@ -45,15 +50,12 @@ export class GmsUser {
     if (
       user.gmsAllowed &&
       (user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_FIRST ||
+        user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_FIRST_INITIAL ||
         user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_FULL)
     ) {
       return user.firstName
     }
-    if (
-      user.gmsAllowed &&
-      (user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_FIRST_INITIAL ||
-        user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_INITIALS)
-    ) {
+    if (user.gmsAllowed && user.gmsPublishName === GmsPublishNameType.GMS_PUBLISH_NAME_INITIALS) {
       return user.firstName.substring(0, 1) + '.'
     }
   }
@@ -72,7 +74,7 @@ export class GmsUser {
   }
 
   private getGmsEmail(user: dbUser): string | undefined {
-    if (user.gmsAllowed && user.emailContact.gmsPublishEmail === true) {
+    if (user.gmsAllowed && user.emailContact.gmsPublishEmail) {
       return user.emailContact.email
     }
   }
@@ -97,11 +99,19 @@ export class GmsUser {
   }
 
   private getGmsAddress(user: dbUser): string | undefined {
-    if (
-      user.gmsAllowed &&
-      user.emailContact.gmsPublishPost === GmsPublishPostType.GMS_PUBLISH_POST_FULL
-    ) {
-      return user.emailContact.address
+    if (user.gmsAllowed) {
+      if (user.emailContact.gmsPublishPost === GmsPublishPostType.GMS_PUBLISH_POST_FULL) {
+        const address = [
+          '' + user.emailContact.country,
+          ...(user.emailContact.zipCode ? user.emailContact.zipCode : ' '),
+          user.emailContact.city ? user.emailContact.city : ' ',
+          user.emailContact.address ? user.emailContact.address : ' ',
+        ]
+          .map((a) => a.trim())
+          .filter(Boolean)
+          .join(', ')
+        return address
+      }
     }
   }
 
diff --git a/backend/src/config/index.ts b/backend/src/config/index.ts
index d28256119..7efb1e91f 100644
--- a/backend/src/config/index.ts
+++ b/backend/src/config/index.ts
@@ -135,6 +135,7 @@ const federation = {
 }
 
 const gms = {
+  GMS_ACTIVE: process.env.GMS_ACTIVE === 'true' || false,
   // koordinates of Illuminz-instance of GMS
   GMS_HOST: process.env.GMS_HOST ?? 'localhost',
   GMS_PORT: process.env.GMS_PORT ?? '4044',
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index 1f21abbb9..902abaf99 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -71,6 +71,7 @@ import { findUserByIdentifier } from './util/findUserByIdentifier'
 import { findUsers } from './util/findUsers'
 import { getKlicktippState } from './util/getKlicktippState'
 import { setUserRole, deleteUserRole } from './util/modifyUserRole'
+import { sendUserToGms } from './util/sendUserToGms'
 import { validateAlias } from './util/validateAlias'
 
 const LANGUAGES = ['de', 'en', 'es', 'fr', 'nl']
@@ -361,6 +362,18 @@ export class UserResolver {
     } else {
       await EVENT_USER_REGISTER(dbUser)
     }
+
+    if (CONFIG.GMS_ACTIVE) {
+      logger.info('GMS deactivated per configuration! New user is not published to GMS.')
+    } else {
+      try {
+        if (dbUser.gmsAllowed && !dbUser.gmsRegistered) {
+          await sendUserToGms(dbUser, homeCom)
+        }
+      } catch (err) {
+        logger.error('Error publishing new created user to GMS:', err)
+      }
+    }
     return new User(dbUser)
   }
 
diff --git a/backend/src/graphql/resolver/util/sendUserToGms.ts b/backend/src/graphql/resolver/util/sendUserToGms.ts
new file mode 100644
index 000000000..335141ffe
--- /dev/null
+++ b/backend/src/graphql/resolver/util/sendUserToGms.ts
@@ -0,0 +1,27 @@
+import { Community as DbCommunity } from '@entity/Community'
+import { User as DbUser } from '@entity/User'
+
+import { createGmsUser } from '@/apis/gms/GmsClient'
+import { GmsUser } from '@/apis/gms/model/GmsUser'
+import { LogError } from '@/server/LogError'
+import { backendLogger as logger } from '@/server/logger'
+
+export async function sendUserToGms(user: DbUser, homeCom: DbCommunity): Promise<void> {
+  if (homeCom.gmsApiKey === null) {
+    throw new LogError('HomeCommunity needs GMS-ApiKey to publish user data to GMS.')
+  }
+  logger.debug('User send to GMS:', user)
+  const gmsUser = new GmsUser(user)
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-unsafe-argument
+    if (await createGmsUser(homeCom.gmsApiKey, gmsUser)) {
+      logger.debug('GMS user published successfully:', gmsUser)
+      user.gmsRegistered = true
+      user.gmsRegisteredAt = new Date()
+      await DbUser.save(user)
+      logger.debug('mark user as gms published:', user)
+    }
+  } catch (err) {
+    logger.warn('publishing user fails with ', err)
+  }
+}
diff --git a/backend/src/seeds/gmsUserList.ts b/backend/src/seeds/gmsUserList.ts
index 009c097a7..68bb86650 100644
--- a/backend/src/seeds/gmsUserList.ts
+++ b/backend/src/seeds/gmsUserList.ts
@@ -5,15 +5,10 @@
 /* eslint-disable @typescript-eslint/no-unsafe-return */
 
 import { entities } from '@entity/index'
-import { User as DbUser } from '@entity/User'
 import { createTestClient } from 'apollo-server-testing'
 
-import { communityList, createGmsUser, userList } from '@/apis/gms/GmsClient'
-import { GmsUser } from '@/apis/gms/model/GmsUser'
 import { CONFIG } from '@/config'
-import { getHomeCommunity } from '@/graphql/resolver/util/communities'
 import { createServer } from '@/server/createServer'
-import { LogError } from '@/server/LogError'
 import { backendLogger as logger } from '@/server/logger'
 
 CONFIG.EMAIL = false
@@ -52,10 +47,10 @@ const run = async () => {
 
   // test GMS-Api Client
   try {
-    const gmsComArray = await communityList()
-    logger.debug('GMS-Community-List:', gmsComArray)
-    const gmsUserArray = await userList()
-    logger.debug('GMS-Community-User-List:', gmsUserArray)
+    // const gmsComArray = await communityList()
+    // logger.debug('GMS-Community-List:', gmsComArray)
+    // const gmsUserArray = await userList()
+    // logger.debug('GMS-Community-User-List:', gmsUserArray)
   } catch (err) {
     logger.error('Error in GMS-API:', err)
   }