I have an android device, that I transfer files to and from with jmtpfs in my Debian system.
I searched and found the package sys-fs/jmtpfs, which I unmasked and emerged.
When the installation has finished it complained:* CONFIG_FUSE_FS: is not set when it should be. so I figured, that is probably a Kernel configuration I have not made.
I found it here:
File systems --->
I enabled it as a module.
Now I could modprobe fuse, and then run tmtpfs /path/to/mount/it