Hello, I worked 10 years as a level-2/NOC tech for a voip company based in the US, I'm very familiar with PBX systems like Asterisk and FPBX, I have installed, troubleshoot and customized lots of PBX systems, I'm not really familiar with Twillio, but they appear to be a cloud service just like Nexmo, I have built different SMS integrations before, using different APIs like experttexting and nexmo; I can build your python script and integrate it with your Asterisk dial-plan (I assume your PBX is asterisk as it says on the required skills) so the SMS with your google-map link is sent over twillio to the caller-ID of the originating party accessing feature code, or even through Asterisk if you have some sort of gsm dongle. Feel free to contact me to talk more on this project.
Thank you!