I got this to run as a POC with no internet at all! However i have not been able to test it loading Gateway as I have an N3DS XL. This is what you do.
1. Download the files attached
2. Unzip the files to your android phone in the phone memory/gw3ds folder
3. Android: On the Play Store download and install
Servers Ultimate App
4. Android: On the Play Store download and install
Servers Pack C app
5. On your android phoen open the Servers Ultimate App > Servers > + > PHP and Lightttpd Server
6.In the General Tab > server name call it gateway, in the Specific Tab > Tick "Force use root to start the server" and set document root to the gw3ds folder
7. Then save
8. On your android phone disable your mobile data and turn off your wifi (VERY IMPORTANT STEP TO PREVENT 3DS CONNECTING TO NINTENDO SERVERS)
9. Set up the Android Access Point on your android phone and turn it on
10. On your 3DS Go to settings and connect to your Android Phone
11. Go to your Android Phone and run the Server, Go to Servers Ultimate > Servers > Gateway > Start
12. On your 3DS go to your internet browser, clear cookies
13. In the address type "
http://192.168.43.1/index2.html"
14. You should see a small text which says gateway hyperlink on the top, click this text
15. The gateway exploit should load
Enjoy!!
I can add images and pictures if you guys request