gdbdbg will gather some general debugging information as well as the stack traces from each thread.

gdbdbg-info <pid>

gdbdbg-inject can be used to inject some python code into the running process.

If you have manhole installed you can write a script like this:

import manhole
manhole.install()

And inject it with gdbdbg-inject:

gdbdbg-inject <pid> manhole.py