diff --git a/app/check-gitlab-approvals.sh b/app/check-gitlab-approvals.sh
index f9dccd6..884beb0 100755
--- a/app/check-gitlab-approvals.sh
+++ b/app/check-gitlab-approvals.sh
@@ -29,6 +29,7 @@
 # We assume that env variables are populated correctly (according to Atlantis documentation)
 # and script is executed in proper custom workflow context:
 # - ATLANTIS_GITLAB_TOKEN
+# - ATLANTIS_GITLAB_HOSTNAME (if private GitLab is used)
 # - HEAD_REPO_OWNER
 # - HEAD_REPO_NAME
 # - PULL_NUM
@@ -45,6 +46,10 @@ fi
 
 # Variable needed for `glab`
 export GITLAB_TOKEN=${ATLANTIS_GITLAB_TOKEN}
+if [ -v ATLANTIS_GITLAB_HOSTNAME ] && [ ! -z "$ATLANTIS_GITLAB_HOSTNAME" ]; then
+  # if env set and not empty set GITLAB_HOST
+  export GITLAB_HOST="https://${ATLANTIS_GITLAB_HOSTNAME}"
+fi
 
 REPO_NAME="${HEAD_REPO_OWNER}/${HEAD_REPO_NAME}"
 
diff --git a/app/pull-gitlab-variables.sh b/app/pull-gitlab-variables.sh
index 6fb35bd..26a4c5c 100755
--- a/app/pull-gitlab-variables.sh
+++ b/app/pull-gitlab-variables.sh
@@ -9,6 +9,7 @@
 # We assume that env variables are populated correctly (according to Atlantis documentation)
 # and script is executed in proper custom workflow context:
 # - ATLANTIS_GITLAB_TOKEN
+# - ATLANTIS_GITLAB_HOSTNAME (if private GitLab is used)
 # - HEAD_REPO_OWNER
 # - HEAD_REPO_NAME
 # - REPO_REL_DIR - currently the script will use GitLab's environment scope (and `*`) from a directly nested directory under `environments/`
@@ -21,6 +22,10 @@
 
 # Variable needed for `glab`
 export GITLAB_TOKEN=${ATLANTIS_GITLAB_TOKEN}
+if [ -v ATLANTIS_GITLAB_HOSTNAME ] && [ ! -z "$ATLANTIS_GITLAB_HOSTNAME" ]; then
+  # if env set and not empty set GITLAB_HOST
+  export GITLAB_HOST="https://${ATLANTIS_GITLAB_HOSTNAME}"
+fi
 
 ENV_SCOPE=$(echo $REPO_REL_DIR | sed -nE 's/environments\/([^/]+).*/\1/p')
 : "${ENV_SCOPE:=*}"