diff --git a/modules/gnetBidAdapter.js b/modules/gnetBidAdapter.js
new file mode 100644
index 00000000000..f45c10195cd
--- /dev/null
+++ b/modules/gnetBidAdapter.js
@@ -0,0 +1,104 @@
+import { registerBidder } from '../src/adapters/bidderFactory.js';
+import * as utils from '../src/utils.js';
+import { BANNER } from '../src/mediaTypes.js';
+
+const BIDDER_CODE = 'gnet';
+const ENDPOINT = 'https://adserver.gnetproject.com/prebid.php';
+
+export const spec = {
+  code: BIDDER_CODE,
+  supportedMediaTypes: [BANNER],
+
+  /**
+   * Determines whether or not the given bid request is valid.
+   *
+   * @param {BidRequest} bid The bid params to validate.
+   * @return boolean True if this is a valid bid, and false otherwise.
+   */
+  isBidRequestValid: function (bid) {
+    return !!(bid.params.websiteId);
+  },
+
+  /**
+   * Make a server request from the list of BidRequests.
+   *
+   * @param {validBidRequests[]} - an array of bids
+   * @return ServerRequest Info describing the request to the server.
+   */
+  buildRequests: function (validBidRequests, bidderRequest) {
+    const bidRequests = [];
+    const referer = bidderRequest.refererInfo.referer;
+
+    utils._each(validBidRequests, (request) => {
+      const data = {};
+
+      data.referer = referer;
+      data.adUnitCode = request.adUnitCode;
+      data.bidId = request.bidId;
+      data.transactionId = request.transactionId;
+
+      data.sizes = utils.parseSizesInput(request.sizes);
+
+      data.params = request.params;
+
+      const payloadString = JSON.stringify(data);
+
+      bidRequests.push({
+        method: 'POST',
+        url: ENDPOINT,
+        mode: 'no-cors',
+        options: {
+          withCredentials: false,
+        },
+        data: payloadString
+      });
+    });
+
+    return bidRequests;
+  },
+
+  /**
+   * Unpack the response from the server into a list of bids.
+   *
+   * @param {*} serverResponse A successful response from the server.
+   * @return {Bid[]} An array of bids which were nested inside the server.
+   */
+  interpretResponse: function (serverResponse, requests) {
+    if (typeof serverResponse !== 'object') {
+      return [];
+    }
+
+    const res = serverResponse && serverResponse.body;
+
+    if (utils.isEmpty(res)) {
+      return [];
+    }
+
+    if (res.bids) {
+      const bids = [];
+      utils._each(res.bids, (bidData) => {
+        const bid = {
+          requestId: bidData.bidId,
+          cpm: bidData.cpm,
+          currency: bidData.currency,
+          width: bidData.width,
+          height: bidData.height,
+          ad: bidData.ad,
+          ttl: 300,
+          meta: {
+            advertiserDomains: bidData.adomain ? bidData.adomain : []
+          },
+          creativeId: bidData.creativeId,
+          netRevenue: true,
+        };
+        bids.push(bid);
+      });
+
+      return bids;
+    }
+
+    return [];
+  },
+};
+
+registerBidder(spec);
diff --git a/modules/gnetBidAdapter.md b/modules/gnetBidAdapter.md
index 6dac9be17b6..447d00d8ff2 100644
--- a/modules/gnetBidAdapter.md
+++ b/modules/gnetBidAdapter.md
@@ -8,7 +8,7 @@ Maintainer: roberto.wu@grumft.com
 
 # Description
 
-Module that connects to Example's demand sources
+Connect to Gnet Project exchange for bids.
 
 # Test Parameters
 ```
@@ -24,8 +24,7 @@ Module that connects to Example's demand sources
                 {
                     bidder: 'gnet',
                     params: {
-                        websiteId: '4',
-                        externalId: '4d52cccf30309282256012cf30309282'
+                        websiteId: '4'
                     }
                 }
             ]
diff --git a/test/spec/modules/gnetBidAdapter_spec.js b/test/spec/modules/gnetBidAdapter_spec.js
new file mode 100644
index 00000000000..eeb33418a82
--- /dev/null
+++ b/test/spec/modules/gnetBidAdapter_spec.js
@@ -0,0 +1,145 @@
+import {
+  expect
+} from 'chai';
+import {
+  spec
+} from 'modules/gnetBidAdapter.js';
+import {
+  newBidder
+} from 'src/adapters/bidderFactory.js';
+
+const ENDPOINT = 'https://adserver.gnetproject.com/prebid.php';
+
+describe('gnetAdapter', function () {
+  const adapter = newBidder(spec);
+
+  describe('inherited functions', function () {
+    it('exists and is a function', function () {
+      expect(adapter.callBids).to.exist.and.to.be.a('function');
+    });
+  });
+
+  describe('isBidRequestValid', function () {
+    let bid = {
+      bidder: 'gnet',
+      params: {
+        websiteId: '4'
+      }
+    };
+
+    it('should return true when required params found', function () {
+      expect(spec.isBidRequestValid(bid)).to.equal(true);
+    });
+
+    it('should return false when required params are not passed', function () {
+      let bid = Object.assign({}, bid);
+      delete bid.params;
+      bid.params = {};
+      expect(spec.isBidRequestValid(bid)).to.equal(false);
+    });
+  });
+
+  describe('buildRequests', function () {
+    const bidRequests = [{
+      bidder: 'gnet',
+      params: {
+        websiteId: '4'
+      },
+      adUnitCode: '/150790500/4_ZONA_IAB_300x250_5',
+      sizes: [
+        [300, 250],
+      ],
+      bidId: '2a19afd5173318',
+      bidderRequestId: '1f4001782ac16c',
+      auctionId: 'aba03555-4802-4c45-9f15-05ffa8594cff',
+      transactionId: '894bdff6-61ec-4bec-a5a9-f36a5bfccef5'
+    }];
+
+    const bidderRequest = {
+      refererInfo: {
+        referer: 'https://gnetproject.com/'
+      }
+    };
+
+    it('sends bid request to ENDPOINT via POST', function () {
+      const requests = spec.buildRequests(bidRequests, bidderRequest);
+      expect(requests[0].url).to.equal(ENDPOINT);
+      expect(requests[0].method).to.equal('POST');
+      expect(requests[0].data).to.equal(JSON.stringify({
+        'referer': 'https://gnetproject.com/',
+        'adUnitCode': '/150790500/4_ZONA_IAB_300x250_5',
+        'bidId': '2a19afd5173318',
+        'transactionId': '894bdff6-61ec-4bec-a5a9-f36a5bfccef5',
+        'sizes': ['300x250'],
+        'params': {
+          'websiteId': '4'
+        }
+      }));
+    });
+  });
+
+  describe('interpretResponse', function () {
+    const bidderRequests = [{
+      bidder: 'gnet',
+      params: {
+        clientId: '123456'
+      },
+      adUnitCode: '/150790500/4_ZONA_IAB_300x250_5',
+      sizes: [
+        [300, 250],
+      ],
+      bidId: '2a19afd5173318',
+      bidderRequestId: '1f4001782ac16c',
+      auctionId: 'aba03555-4802-4c45-9f15-05ffa8594cff',
+      transactionId: '894bdff6-61ec-4bec-a5a9-f36a5bfccef5'
+    }];
+
+    it('should get correct banner bid response', function () {
+      const response = {
+        bids: [
+          {
+            bidId: '2a19afd5173318',
+            cpm: 0.1,
+            currency: 'BRL',
+            width: 300,
+            height: 250,
+            ad: '<html><h3>I am an ad</h3></html>',
+            creativeId: '173560700',
+          }
+        ]
+      };
+
+      const expectedResponse = [
+        {
+          requestId: '2a19afd5173318',
+          cpm: 0.1,
+          currency: 'BRL',
+          width: 300,
+          height: 250,
+          ad: '<html><h3>I am an ad</h3></html>',
+          ttl: 300,
+          meta: {
+            advertiserDomains: []
+          },
+          creativeId: '173560700',
+          netRevenue: true
+        }
+      ];
+
+      const result = spec.interpretResponse({
+        body: response
+      }, bidderRequests);
+      expect(result).to.have.lengthOf(1);
+      expect(result).to.deep.have.same.members(expectedResponse);
+    });
+
+    it('handles nobid responses', function () {
+      const response = '';
+
+      const result = spec.interpretResponse({
+        body: response
+      }, bidderRequests);
+      expect(result.length).to.equal(0);
+    });
+  });
+});