diff --git a/.github/workflows/cronjob.yml b/.github/workflows/cronjob.yml
index 941d3a5b..32f6c718 100644
--- a/.github/workflows/cronjob.yml
+++ b/.github/workflows/cronjob.yml
@@ -56,6 +56,48 @@ jobs:
       - name: Run tests
         run: bundle exec rspec
 
+  postgis:
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        ruby:
+          - 3.2.2
+    env:
+      DB: postgis
+      RAILS: main
+      DATABASE_USERNAME: postgres
+      DATABASE_PASSWORD: postgres
+      DATABASE_HOST: 127.0.0.1
+    services:
+      postgres:
+        image: postgres
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_HOST_AUTH_METHOD: trust
+        # Set health checks to wait until postgres has started
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+      - name: Setup databases
+        run: |
+          psql -h localhost -p 5432 -W postgres -c 'create database ransack;' -U postgres;
+      - name: Install dependencies
+        run: bundle install
+      - name: Run tests
+        run: bundle exec rspec
+
   postgres:
     runs-on: ubuntu-22.04
     strategy:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 0025eb93..0b7f7a3c 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -68,6 +68,53 @@ jobs:
       - name: Run tests
         run: bundle exec rspec
 
+  postgis:
+    runs-on: ubuntu-22.04
+    strategy:
+      fail-fast: false
+      matrix:
+        rails:
+          - 7-2-stable
+          - v7.1.0
+          - v7.0.3
+          - v6.1.6
+        ruby:
+          - 3.2.2
+          - 3.1.4
+    env:
+      DB: postgis
+      RAILS: ${{ matrix.rails }}
+      DATABASE_USERNAME: postgres
+      DATABASE_PASSWORD: postgres
+      DATABASE_HOST: 127.0.0.1
+    services:
+      postgres:
+        image: postgres
+        ports:
+          - 5432:5432
+        env:
+          POSTGRES_PASSWORD: postgres
+          POSTGRES_HOST_AUTH_METHOD: trust
+        # Set health checks to wait until postgres has started
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Setup databases
+        run: |
+          psql -h localhost -p 5432 -W postgres -c 'create database ransack;' -U postgres;
+      - name: Run tests
+        run: bundle exec rspec
+
   postgres:
     runs-on: ubuntu-22.04
     strategy:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4dee586f..98a801e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## Unreleased
 
+* Fix wildcard escaping with PostGIS adapter.
+
 ## 4.2.1 - 2024-8-11
 
 * Fix Rails 7.1.x compatibility
diff --git a/Gemfile b/Gemfile
index 695a117e..700c9d19 100644
--- a/Gemfile
+++ b/Gemfile
@@ -17,6 +17,7 @@ rails_version = case rails
 gem 'faker'
 gem 'sqlite3', '~> 1.4'
 gem 'pg'
+gem 'activerecord-postgis-adapter'
 gem 'pry'
 gem 'byebug'
 
diff --git a/lib/ransack/constants.rb b/lib/ransack/constants.rb
index 9202b4b0..027e87be 100644
--- a/lib/ransack/constants.rb
+++ b/lib/ransack/constants.rb
@@ -165,7 +165,7 @@ def escape_wildcards(unescaped)
       when "Mysql2".freeze
         # Necessary for MySQL
         unescaped.to_s.gsub(/([\\%_])/, '\\\\\\1')
-      when "PostgreSQL".freeze
+      when "PostGIS".freeze, "PostgreSQL".freeze
         # Necessary for PostgreSQL
         unescaped.to_s.gsub(/([\\%_.])/, '\\\\\\1')
       else
diff --git a/spec/ransack/predicate_spec.rb b/spec/ransack/predicate_spec.rb
index ae0972d9..4b243456 100644
--- a/spec/ransack/predicate_spec.rb
+++ b/spec/ransack/predicate_spec.rb
@@ -158,9 +158,10 @@ module Ransack
 
     describe 'cont' do
       it_has_behavior 'wildcard escaping', :name_cont,
-        (if ActiveRecord::Base.connection.adapter_name == "PostgreSQL"
+        (case ActiveRecord::Base.connection.adapter_name
+        when "PostGIS", "PostgreSQL"
           /"people"."name" ILIKE '%\\%\\.\\_\\\\%'/
-        elsif ActiveRecord::Base.connection.adapter_name == "Mysql2"
+        when "Mysql2"
           /`people`.`name` LIKE '%\\\\%.\\\\_\\\\\\\\%'/
         else
          /"people"."name" LIKE '%%._\\%'/
@@ -177,9 +178,10 @@ module Ransack
 
     describe 'not_cont' do
       it_has_behavior 'wildcard escaping', :name_not_cont,
-        (if ActiveRecord::Base.connection.adapter_name == "PostgreSQL"
+        (case ActiveRecord::Base.connection.adapter_name
+        when "PostGIS", "PostgreSQL"
           /"people"."name" NOT ILIKE '%\\%\\.\\_\\\\%'/
-        elsif ActiveRecord::Base.connection.adapter_name == "Mysql2"
+        when  "Mysql2"
           /`people`.`name` NOT LIKE '%\\\\%.\\\\_\\\\\\\\%'/
         else
          /"people"."name" NOT LIKE '%%._\\%'/
@@ -196,9 +198,12 @@ module Ransack
 
     describe 'i_cont' do
       it_has_behavior 'wildcard escaping', :name_i_cont,
-        (if ActiveRecord::Base.connection.adapter_name == "PostgreSQL"
+        (case ActiveRecord::Base.connection.adapter_name
+        when "PostGIS"
+          /LOWER\("people"."name"\) ILIKE '%\\%\\.\\_\\\\%'/
+        when "PostgreSQL"
           /"people"."name" ILIKE '%\\%\\.\\_\\\\%'/
-        elsif ActiveRecord::Base.connection.adapter_name == "Mysql2"
+        when "Mysql2"
           /LOWER\(`people`.`name`\) LIKE '%\\\\%.\\\\_\\\\\\\\%'/
         else
          /LOWER\("people"."name"\) LIKE '%%._\\%'/
@@ -215,9 +220,12 @@ module Ransack
 
     describe 'not_i_cont' do
       it_has_behavior 'wildcard escaping', :name_not_i_cont,
-        (if ActiveRecord::Base.connection.adapter_name == "PostgreSQL"
+        (case ActiveRecord::Base.connection.adapter_name
+        when "PostGIS"
+          /LOWER\("people"."name"\) NOT ILIKE '%\\%\\.\\_\\\\%'/
+        when "PostgreSQL"
           /"people"."name" NOT ILIKE '%\\%\\.\\_\\\\%'/
-        elsif ActiveRecord::Base.connection.adapter_name == "Mysql2"
+        when "Mysql2"
           /LOWER\(`people`.`name`\) NOT LIKE '%\\\\%.\\\\_\\\\\\\\%'/
         else
          /LOWER\("people"."name"\) NOT LIKE '%%._\\%'/
diff --git a/spec/support/schema.rb b/spec/support/schema.rb
index 555299c4..f51abc50 100644
--- a/spec/support/schema.rb
+++ b/spec/support/schema.rb
@@ -1,4 +1,5 @@
 require 'active_record'
+require 'activerecord-postgis-adapter'
 
 case ENV['DB'].try(:downcase)
 when 'mysql', 'mysql2'
@@ -20,6 +21,17 @@
     host: ENV.fetch("DATABASE_HOST") { "localhost" },
     min_messages: 'warning'
   )
+when 'postgis'
+  # To test with PostGIS: `DB=postgis bundle exec rake spec`
+  ActiveRecord::Base.establish_connection(
+    adapter: 'postgis',
+    postgis_extension: 'postgis',
+    database: 'ransack',
+    username: ENV.fetch("DATABASE_USERNAME") { "postgres" },
+    password: ENV.fetch("DATABASE_PASSWORD") { "" },
+    host: ENV.fetch("DATABASE_HOST") { "localhost" },
+    min_messages: 'warning'
+  )
 else
   # Otherwise, assume SQLite3: `bundle exec rake spec`
   ActiveRecord::Base.establish_connection(