Hello, is there anyway I can debug a system over the internet?

Customer is far away, he has ST-link, a PC and the unit that needs debugging, of course.

It is not practical to install  the tool chain and all project files on his PC, even if can be done, I can’t do it. (I can remote login to his PC)

Is there a way to install some small GDB server on the customer’s PC and debug the unit remotely? (customer using windows 10, I think,  but maybe 7)

Thanks.